Showing posts with label forum post. Show all posts
Showing posts with label forum post. Show all posts

Thursday, February 25, 2010

Future Math

It seems to me that every year there is new, incredibly ground breaking technology. Math included. This technology always is portrayed as the "future." Its gonna change the world around us! Well, I believe that we do that by ourselves. We already have the technologies to change our world, how we use should be the most pressing issue.

Currently, everything we create is built in order to streamline the process. As shown in the article, shopping is included. The fact that a company has the rights to what music I'll be buying next, or my favorite author may, in fact, be quite frightening. I am a believer in the fact that the more this technology piles on, the more cautious we need to be about how we use it. Computers already have capabilities far beyond that of any human. As a race, we need to hold true to our roots. We must embrace technology in a way that we do not inhibit our natural tendencies.

I don't mean to be all superficial and such, but is this really that far from possible?...

Alright, maybe thats a little far fetched. But, I would say that we are likely on our way there.

I think that all this technology is definitely beneficial and could greatly change the world we live in. It has the opportunity to benefit all of us. However, I would stress that we should keep in mind where we would like to be, and where we are going.

Sunday, February 21, 2010

Math in our everyday life!!

“There has never been a good time to be a mathematician.”

In today’s society, everything falls on math. All the careers have some math concept involved in somehow. This has been the case for several years, but nowadays, as evolutions keeps on going farther, the need of math increases. Statistics is used in the medical field to determinate the improvement of health conditions, in business to improve the quality of work done, in security agencies to insure the safety of the citizens.

First, this article explains the pros of math and its development. The world is now dominated by Web2.0. Education, entertainment, shopping, careers, etc. everything can be done online, and this won’t be possible without the contributions of mathematicians. Since they are much needed in today’s society, the article suggests that students, especially in America, should be encouraged to pursue their careers in math or math related major fields. The example is given in the case of the NSA which employs only US citizens. From here, it can be concluded that the security of Americans is limited, since it is less than what it could be.

The other side of the article explains how these ongoing improvements in the math’s world are quite disturbing. Since people are concerned about the privacy problem, it’s hard to make improvement in medicine for example. Since much of these math based programs use people’s private information, there have been some complaints about this, and they are refusing to give up their information to the public. This pushed mathematicians, doctors and other concerned people to look for other alternatives in their problem solving strategies

Overall, this article made me think about all the connections that can be made between the world of math, which is always perfect (with exact answers), and the real world, which is always a cumulative result of more or less estimations and probabilities. There have been some times when, in the middle of class or while doing a math problem, I said to myself “when am I ever going to use this?” This article reminded me that’s always a rhetorical question I have in mind, that somewhere in the back of my conscious mind I know that I will use it. It also reminded me the saying that says “Math is related to Physics, Physics related to Chemistry, Chemistry related to Biology, and Biology related to Life.” So, in the end, math is related to our lives, either directly or indirectly.

Ahhh Math!!

This article mainly focuses on the fact that we live in a predominantly technology focused world which means math is becoming more apparent in our everyday lives. Whether we know it or not, every time we check our email, or watch tv, math played a big part in getting that type of information into our homes. Since computers became popular around the world, it is much easier for companies to track their products and to see what their customers really think. This type of media, I think, makes the world a more communal place since everyone gets to express their views and show them to the whole world.
I think that the math the article talks about is more behind the scenes more most of the population. Many people don't know how much math goes into their daily activities, and they will never need to know or be exposed to it in any way. I think you would only really realize how big of a role math plays in our technological society if you had a job as a computer programmer, or your job entailed a lot of statistics. To use computers the average person doesn't need to know much about math, in fact it seems like each new version of various operating systems make it so there is less and less calculations and knowledge involved. Now almost anyone can use a computer. I think the world is moving towards simplicity. Only a select few will know all the math involved in shaping our society. Computer programming knowledge will be the new skilled craftsmen. Instead of needing painters and woodworkers, in the future we will need more computer programmers.

I found this video that shows some of the math involved in computer programming:

Math is Super

This article really made me think about my future. It seems as though, if you want to be someone with influence in the world, your best bet is to become a math major. Baker talks of how math greatly influences the world we live in. Although i did not fully understand the relationship, I understood that it math is very critical in the world today. Most everything in our daily lives can be analyzed in number because of patterns that exist. Words, movements and emotions can all be described in numbers. Its all quite amazing. Businesses use these patterns to predict what we people want in order to sell products and such. Internet, for example, is monitored by computers that gather data from keywords that we type to build a sort of profile of each person in order to see what we want. These companies use the data to advertise their products. Though this analyzation of the internet, companies can find out what is popular among people fairly easily. This is a concern to many because it is in some way an invasion of our privacy.  There are debates regarding the monitoring of the internet and phones in congress. On the hand, these computers can pick up suspicious behavior that could help with the war on terrorism. Companies are working to protect privacy as well as get enough info to build good data. All these companies are at the frontier of the technological movement of mathematics playing a huge part in our daily lives. And the workers at these companies are kids straight out of college who are good at math. And they make a good amount of money if they score a big idea that another company wants to buy. Its a good place to be, which make me consider taking that route. Plus, the US needs more locals to be these math geniuses because so many of the people working at these companies are foreign born. Its also kind of scary how much math can do. How it can predict what people want and how it can pick up conversations through computers that were intended for few people. Our whole way of life is being converted into numbers. Although computers have the capability to cure illnesses and stuff in is important to note that eventually they may turn on us like they did in terminator, just a thought. In conclusion, like Baker states, it is a good time to know math because it is what is moving the world forward. 

Math is Everywhere

The article was about how math is used; it is used in everything now. It is used to track the way people buy products, where they buy products, and the way they react to ads. Google uses it to see which sites people are clicking on, and what sites they are buying things from. All of this monitoring, does have it’s downsides though, even though companies will be saving money what about people’s personal privacy, do they still deserve that?

I think that the main problem with this whole thing is that idea of lost privacy. I don’t necessarily want people watching all of the things that I buy, and all of the things that I click on the Internet even if it isn’t inappropriate. So as the article pointed out I would probably take measures to see that the companies couldn’t track what I said, bought and clicked on. The article also pointed out that the government is using the same data to find terrorists, and track diseases. So it is a mixed bag whether we should trust this whole database of information about us. What is interesting and more concrete though is that people who are going into college right now should probably major in something math related if they are at all into it because that is where the market is. At least that is what the article said. I disagree. I think that it would be sad if all these bright people decided to go into math simply because that is where the jobs lie. People should follow their passion. This was an interesting article but I disagree with it in some aspects, I don’t think that our lives should be so closely monitored even if it does help homeland security or our health, it isn’t natural, or healthy in my opinion. And I don’t want my life to be run by either a government or by industries.

Math Changes The World Once Agian

The article directly handles the effects of a rapidly changing world and how Calculus and other even more advances areas in the field of mathematics can be used to not only describe, but predict and change our future. They quite clearly state that the need for advanced mathematics is growing nad the those who will be the most successful in the job world will be those who have atleast some portion of advanced mathematics.

How Math Transforms Industries discusses many different fields ranging from business to media and explains how each has and will be effected by further advances in technology and mathematics. How Much Math Do We Need to Know discusses just that, how much is going to be enough? Touching on Calculus, statiscs, advanced algebra and Geometry. Pointing out that in extremely advanced Geometry, techniques were used from that field to create search engines such as Google, and Yahoo. How? I don't know, but it says thats how they did it.

For me this article to me wass incredibly fasinating. The fact that we are moving into an age where quite simply understanding and being able to apply multiple types of advanced math to pieces of data,collections of information, to quite simply predict the future. Adjust plans, marketing schemes, business models, all based off of data. This following paragraph clearly illustrates a prime example of what has been done and what is still to come form this field of advanced mathematics in business.


"The clearest example of math's disruptive power is in advertising. There Google and other searchcompanies built on math are turning an industry that grew on ideas, hunches, and personalrelationships into a series of calculations. They can pull it off because, quite simply, they know wheretheir prospective customers are browsing, what they click on, and often, what they buy. Internetcompanies use this data not only to profile customers but also to pitch for more contracts. Some 18months ago, 3blue-chip companies, from Procter & Gamble Co. () to Walt Disney Co. (), underwent a series of tests promoted by the Interactive Advertising Bureau, an industry group. These studiescrunched consumer data to measure the effectiveness of advertising in a host of media. The resultscame back in hard numbers. They indicated, for example, that Ford Motor Co. () could have sold anadditional $625 million worth of trucks if it had lifted its online ad budget from 2.5% to 6% of the total. Ford responded vigorously: Last August it announced plans to move up to 30% of its billion adbudget into media targeted to individual customers, half of it through online advertising. Such movesare sure to generate even more data, giving greater clout to the numbers people."

http://www.businessweek.com/print/magazine/content/06_04/b3968001.htm?chan=gl (2 of 6)1/17/2006 2:47:50 AM

While clearly beyond my understanding of how they can make these predictions, i find it amazing that as math has become more and more complicated it has, due to advances in technology only become more and more applicable in the modern work force.

As time progresses mathematic literacy is going to become more and more relavant and I believe more and more a part of our daily lives. So while at times maths and science appear to be largely irrelavant to our futures and what we may possibly want to do with our lives, they may prove to be by far the most important pieces of information we learn in our time in school.

Math is ruling the world

I'm not sure if I'm being sarcastic right now, but this article was truly interesting to me. It explained the close relationships between mathematics, numbers and our daily life containing internet.

Cover story starts with the giant title saying that math will rock the world which is totally true. It starts the article with the system that organize, and structures any written information published by its context, concept, and theme. By doing so, it says that it needs numbers and math to accomplish it. In one sense this sounds totally new to someone, but in other side, this is just a basic common sense that already has been known to the public.

Since the beginning of the construction of computer, math always has always been in people's life style. Like it stated in the article, math is essential to everyday life. Everything is organized with math equations, and everything is programed with algorithms online, and companies have been dealing with their costumers and products based on mathematical models.

Issue of privacy has to come right after that. In the several articles in the cover story it stated about how individual's privacy is becoming public by the development of technology based on math. People's lives have been monitored and gathered as a data for the bigger companies. This is one of the greatest fear that people might have. For the company they have to do this research in order to gain biggest possible profit that could be happen.

Mathematician will be the largest group of people who are ruling the world. It is true that most of the job will provide math skills. Highest rates of mathematics elites will gain the most profit. Math will rock the world; it has been and it will.

Math is rocking the world!!!

Truly, this article is boring. It talks about things that everyone knows. 21st century, for sure is a century of math, of numbers, of data.

Basically, this article is telling us how important it is for people to understand math in this century. Our society now is filled up with data. People who could read and understand these data are appealing to all the big companies. By analyzing the data, math geeks could find out tons of information beyond these numbers. These new information they investigated provides the company a better view to the market and gives the big company a big step ahead of others.

However, there is a big flaw in this new system. As the article says “The power of mathematicians to make sense of personal data and to model the behavior of individuals will inevitably continue to erode privacy”, I think we have lost our privacy for decades. There are cameras everywhere. Government could simply monitor or track someone’s phone with the title of “National Security”. Thing cannot get any worse now, since we are already at the bottom of the abyss.

The title of the article says “Math will rock your world”. I think that is incorrect. I say math is rocking our world and has been rocking our world for at least 20 years.

Think about it, if you will. There are math everywhere in our world. Since the First industrial revolution, science walked into the stage, math also became an irreplaceable part of our society. A huge part of science is actually math. Physics obviously has to do with math. Chemistry involves math. Environment science needs data. Statistics are also math. All the industries, mechanicals, company finance involve what? Math. They need math to sustain the system.

So learning math will be the tendency for the future. For sure, there are other ways to survive in this society, but math will be, and must be the most important thing to know to survive.

Let’s rock…..

How Far Can Math Take Us?

In the first portion of the cover story Math Will Rock Your World, Steven Baker discussed the different applications of math in our world today. The first section discussed the conversion of words into math in order to classify and organize them. He gave the example of Neal Goldman, a math entrepreneur who takes press articles and blog posts and groups them together with related pieces based on their content. The article also discussed mathematical models and their ability to predict a variety of different things such as how to become more productive, make a profit, etc. Through collecting data, they use their findings to establish trends. One potential problem with this system lies with the population and their ability to breech the system. Although this system appears very dependable it also brings its challenges for the United States and the world. As a nation we must work towards creating more mathematicians at home and prevent outsourcing by preparing our students for the business world. Another challenge math entrepreneurs face is individual privacy. They must discover a means of invading privacy to the least extent possible by trying to share group information without sacrificing that of the individual . It surprised me how much math manifests itself in our daily lives. "Some models predict what music we'll buy, others figure out which worker is best equipped for a particular job." I never realized the full potential of math in everything we do. I was also astounded by the extent to which math can invade our privacy and how frequently numbers have begun to replace the individual.
The second portion of the cover story Online Extra: The NSA: Security in Numbers discussed the usage of numbers in terms of security. Baker discussed the NSA's role and how they use math to help figure out terrorist plots and other issues of security. One of the challenges the NSA faces manifests itself in recruiting its mathematicians. They are faced with competition from Google, Yahoo and other organizations. How are they managing? They offer a more quiet, stable lifestyle, which is especially more appealing to women. I thought it was interesting that they were looking for younger employees who did not know the company as well. I assumed they would want older, more experienced workers. I found the selection process quite interesting in that it is a contest which acts as somewhat of an advisory for their decisions.
The third portion Online Extra: Search Advertising by the Numbers discussed bidding on keywords. Baker specifically discussed Imran Khan and his involvement in E-Loan. Kahn makes sure those who are looking for his product will surely find it. Parts of this passage made it seem like math can often get a little bit too invasive, "It (numbers) enables marketers to track customer behavior, and replaces hunches with science." It may have just been the way I read into the article, but that sounds as though it could be problematic in terms of individual privacy issues. I also found the discussion of bidding on keywords and the science behind it a bit confusing.
How Much Math Do We Need to Know? summed up the different uses of Calculus, Algebra and Geometry, Statistics and Probablility, and Math Tools in different careers. Some of the associations are not as obvious as they seem, for example, advanced geometry is used not only in floor tiling but also in designing search engines. With the growing demand for mathematics based, or even just related professions, knowing your math might prove to be helpful. I guess calculus really will pay off in the long run!
How Math Transforms Industries discussed the specific uses of mathematics in many different fields, such as consulting, police and marketing and the media. Who knew a company could "turn written articles into bits of geometry and organize them in a virtual library?" and eventually these automatic systems could make editors obsolete. I found it amazing how much of a difference math has a potential of making on our society. We always talk about technology taking over life as we know it, but what about math?

Math Has Rocked My World

In the article "Quantifying Humanity" the author discusses the uses of math in the business and technological worlds. The author specifically references each math genre (calculus, geometry, statistics etc.) and gives examples of how they can improve technology and create jobs for people in any field of study. For example he talks about how statistics is a major contributer in every job market because whether you are dealing with fashion trends, environmental patterns or oil sales you will be analyzing large sets of data and comparing trends. The article also talks about the importance of calculus in technological advancements and how geometry is not just for laying tile floors but is a huge aspect of engineering.

I personally thought this article was very interesting. I already knew that math was a huge part of the future, but had no idea of the relevance it serves in our every day lives. It was very interesting to learn about the enormous variety professions that use math to succeed. I have never really thought about how math is a huge part of the sales industry or how it helps major distributers like Ford and even insurance companies. It was great for me to see all of the practical uses of math, because it reminded me of why I continue to take math classes and work hard to understand every aspect of math. Math is not my strongest subject, but I believe that it will create many opportunities for me, as well as the rest of the world, in the future. Math has definitely rocked my world, has it rocked yours?

Math: The Future!

This article talked about how math is beginning to become more and more a bigger part of our everyday lives. One way it does this for example, is using math to analyze how well advertising is doing for a company, and how changing advertising can effect profits and sales. It is not limited to this though. Essentially what this article was saying is that math can be used to model and analyze just about everything in the world. Machines, productivity, security, sales, even humans. Another thing that I found really interesting was how important this math really is. The top mathematicians in the world, a select few, are becoming some of the highest paid people. I never would of thought that math would be getting you a 6 figure salary right out of college. This just goes to show how important and how helpful these models are for companies. Another thing it talked about is how these models can be an invasion of privacy, but I didn't really see how. For the most part, I see these models as looking at numbers not people. It turns people into numbers and so I don't really see the invasion of privacy, unless people feel invaded being turned into numbers. It is really interesting though, to think that everything can be justified with numbers.
This is one thing the article reminded me of was the movie Pi, an artistic, mind-blowing thriller about a paranoid mathematician who sees math everywhere and is one the verge of discovering the unifying number that explains everything. Here's a trailer:




The three points he makes about math being everywhere and thus it being able to explain the patterns everywhere in our world is pretty interesting, and relates back to this article. When I first saw this movie, I thought it was a little far-fetched, but now... I'm not so sure. The thing that really got me was that they're working on ways to model human behavior, a supposedly random and unpredictable thing. Maybe math is everywhere, maybe eventually we'll be able to see the patterns present in nature, and maybe someday we can use that knowledge of the patterns for the betterment of humanity and our world. We'll just have to wait and see.

Math Geeks Will Rule the World

In the cover story in Business Week, Steven Baker addressed how math is becoming necessary in today's world. Because our world is now filled with oceans of data, math is being used more and more to 'mine', interpret, and use the data. The beginning of the article talked about how mathematical models can be used by companies to increase revenue:

"These studies crunched consumer data to measure the effectiveness of advertising in a host of media. The results came back in hard numbers. They indicated, for example, that Ford Motor Co. () could have sold an additional $625 million worth of trucks if it had lifted its online ad budget from 2.5% to 6% of the total."(3).

This kind of data is hugely valuable and could be potentially used on a federal level to calculate spending in the government. A lot of the article, however, talked about how math can be used with people, "The power of mathematicians to make sense of personal data and to model the behavior of individuals will inevitably continue to erode privacy." (2). Companies can use math to quantify and analyze their consumers and use that to create effective advertising.

I feel that, if taken too far, this could lead to a bad future. If we live in a world where every person is one of several million that fit a certain profile, that will be used for advertising, our society will continue to be controlled by media and consumerism. I once read a book call Fahrenheit 451, and this article reminded me of that book. In the book, books were banned, and nobody ever had independent thoughts or opinions. Everyone was stuffed full of information and data, but never taught to think about it or draw conclusions from it. Of course, this is a huge exaggeration of our world, but I feel that if the world moves more towards machines, and numbers, and data that generalize society into numerical patterns and equations, the opportunity for free thought and imagination will become less.

As for the part about how what we're leaning now is actually going to help us in the future, I think the importance of knowing high level math is overestimated. Really, we only need a few geniuses to write the computer programs and then the computers do all the math. I guess though, when math geeks and computers rule the world, those with calculus level math education have a better chance of survival.

Will Math Rock My World?

"The next Jonas Salk will be a mathematician, not a doctor." (3) The article 'Math Will Rock Your World' in BusinessWeek explains why.

This article is essentially an overview of one of the directions that math is going in today's world. It focuses on how applied math is becoming increasingly valuable in the world of computer sciences and virtual analysis. Today, those programmers who can write the best algorithms or mine the most crucial data from the internet and its vast quantity of 'unstructured data,' are becoming increasingly valuable. Programs that sift through thousands of blogs, articles, advertisements, etc., and can quantify their results in a way that can create profit are not only becoming more numerous but also more accurate and because of that, more valuable. Because there is such a host of information on the web, the algorithms that are able to pick out useful patterns and tendencies are becoming the new '.com's' of our world. And the people who are math savvy are being increasingly rewarded both monetarily and with power and position.

Beyond that, there was a huge emphasis on humans being transformed into points on a graph. Our behavior, race, achievements, socioeconomic status, and anything else that can be seen as an essential character brick, are being transformed into a statistic on a chart.
“The clearest example of math's disruptive power is in advertising. There Google and other search companies built on math are turning an industry that grew on ideas, hunches, and personal relationships into a series of calculations...Rising flows of data give companies the intelligence to home in on the individual customer. Internet marketers are the natural leaders, but traditional businesses are following suit. Gary W. Loveman, CEO of casino giant Harrah's Entertainment Inc. () and a former Harvard B-school professor, has led the company to build individual profiles of millions of Harrah's customers. The models include gamblers' ages, gender, and Zip codes, as well as the amount of time they spent gambling and how much they won or lost. These data enable Harrah's to study gambling through a host of variables and to target individuals with offers, from getaway weekends to gourmet dining, calculated to maximize returns. In the last five years, Harrah's has averaged 22% annual growth, and its stock has nearly tripled...[Another company scans the web for articles and blogs and] breaks down English messages into the smallest components -- words, phrases, grammar, even emotions -- and turns them into math.” (3-4)

Essentially, that which has been reserved for the qualitative side of analysis is now being analyzed quantitatively.

When I first read this, I was somewhat disturbed. "What right does some algorithm have to turn me into math?! What a gross violation of my humanity!," I thought. But then I realized that if these companies are finding ways to successfully analyze things that have so long been considered subjective, then maybe this isn't a case of the proverbial David getting squashed by Goliath. It's not as if these programmers are making things up about me, they are doing nothing other than analyzing what is already there. And what's so horrible about that? Well, this is where I'm split.

Mystery has always been an essential part of the human experience. Not knowing everything about the present and future has allowed for creativity to flourish and exploration thrive. But, if said mystery is reduced to a margin of triviality, then maybe the exploratory drive that has propelled humanity through the ages will be replaced by a sequential system with the sole goal of profit, eliminating many creative freedoms we now enjoy today. But, on the other hand, maybe they won't be. Maybe computer programs will never be able to map the impetuousness of human nature, and will simply allow us to explore more efficiently, with a more defined direction and with greater success.

But as of now, I'm torn, which will it be?

Quotes cited:

http://www.math.uiuc.edu/MSS/2006-Spring/MathWillRockYourWorld.pdf

Tuesday, February 2, 2010

Choices

Derivative of the Inverse of a Function:

1. If f(x) is an invertible function, then for any point on an invertible function, the derivative of the inverse of the function evaluated at b is equal to the reciprocal of the derivative of the function evaluated at a.

2. If f(x) is an invertible function, then for any point (a,b) of f(x):



3. The volume of a sphere is a function of its radius:

Is volume an invertible function?


”Why yes indeed it is”


4. Inverse Function



5. Graph of:


(2) Choose any point (1,4.188) on V(r) and graph the tangent line through this point
(Blue)
(1) The volume function, V(r) (black)

(3) The inverse function r(V) (red)

(4) The tangent line through the “mirror” point on the graph of the inverse function. (Green)

6. OH MY! The tangents are reciprocals!

Function of the tangent line for V(r) at point (1,4.188)


Function of the tangent line for r(V) at point (4.188,1)


7. I am a strong believer in attending Calculus. I like having the opportunity to ask questions an see what specifically I have trouble understanding as well as listening to a variety of explanations from Bru and other students. I also seem to struggle with the Internet and technology in general so good old-fashioned pencil and paper helps me take in the material much better. Lastly, I am a procrastinator/ minimalist, so having the time to sit down in class provides a much more productive learning experience for me.

I See Functions!

Invertible
LINK: http://www.flickr.com/photos/47183167@N03/4325838211/
invertable

Continuous & Differentiable
LINK:http://www.flickr.com/photos/47183167@N03/4326566468/in/photostream/
Continuous & Differentiable

Non One-to-One
LINK:http://www.flickr.com/photos/47183167@N03/4326552974/
Non One-to-One

Continuous, Non Differentiable
LINK:http://www.flickr.com/photos/47183167@N03/4325766571/in/photostream/
Continuous but not Differentiable

Not Continuous or Differentiable
LINK:http://www.flickr.com/photos/47183167@N03/4326444560/in/photostream/
Not Continuous or Differentiable

I see, and I see Math.

A not one-to-one function

Not a one-to-one function

A continuous and Differentiable function

Invertible function

An invertible function

Continous and Differentiable

Not Continuous and not Differentiable

Not continous and not differentiable

Continuous but not Differentiable

Continuous but not differentiable




Monday, February 1, 2010

I Can See Clearly Now...

Welcome to my photos!
Just in case the titles and hot-spots aren't with the photos, I've put the link to Flickr underneath all my photos.
Cusping Chair

Here's the Link:
http://www.flickr.com/photos/47077084@N08/4310871956/

Rocket Ship!

Here's the Link:
http://www.flickr.com/photos/47077084@N08/4310876542/

Swiffer Handle

Here's the Link:

http://www.flickr.com/photos/47077084@N08/4310137659/


Hanging Lamp

Here's the Link:
http://www.flickr.com/photos/47077084@N08/4310872732/

Old School Snowshoes

Here's the Link:
http://www.flickr.com/photos/47077084@N08/4320611099/

See Math

Continuous and Differnetiable

Photo 18

Not a one to one function

Photo 22

Continuous but not Differentiable

Photo 17

Invertible Function

Photo 19

Not Continuous and not Differentiable

Photo 20

Now I see math

See Math

Continuous, but not differentiable.
Continuous, but not differentiable

This is a function that is not one to one.
Photo 118

Not continuous and not differentiable function.
Not continuous and not differentiable

Invertible Functions
Invertable Function

A continuous and differentiable function.
Continuous and Differentiable

A Very Late Choice Indeed

Derivative of an Inverse Function
The property is simply the reciprocal of the derivative of the inverse of the original function. In layperson terms, it is simply one divided by the derivative of the inverse function. Here it is in symbols to hopefully make it clearer.


This is the inverse of the volume function:
Below is the picture and description of the following functions.
(1) The inverse volume function r(V);
(2) The volume function, V(r);
(3) x=1 on V(r) and graph the tangent line through at this point.
(4) The tangent line through the “mirror” point on the graph of the inverse volume function.


The first function is the inverse volume function which is the gray function in the image of the graph. The second function is the original volume function which is the red function in the image of the graph. The third function is the tangent line to the volume equation at the point x=1. The forth function is the tangent line to the inverse volume function at the mirror point.

To find the function of the tangent line to point x=1 for the volume function you can simply type in the volume function into your calculator and use nDeriv(y1, x, x) to find the derivative at that point. Use the point slope form of a linear equation to form the tangent line at the point x=1 for the volume function. Use the derivative at the point x=1 for the volume function as the slope of the tangent line. Then insert the values of the volume function for x and y when x=1 into the point slope form as x and y. Aha, now you have the slope of the tangent line at the point x=1 for the volume function!

The function of the tangent line of the mirror point for the inverse volume function is found similarily to the previous tangent line. Because we know that this function is the inverse to the volume function the slope of the tangent line through the mirror point will be the inverse of the slope of the linear function of the tangent line to the volume function when x=1. Also we know that the x and y value at the point x=1 will be switched around for the tangent line to the inverse volume function at the mirror point. This is all that you have to do to find the function of the tangent line at the mirror point while utalizing point slope form.

I choose not to go to class and to take the virtual class because I wanted to try something new. Honestly I am quite biased and believe that you learn much better in the classroom instead of on your own by using the internet. I wanted to see if the classroom actually did have a big advantage.