Mathematics Department

[Izuna Uchiha]

Mathematics Department

Most of us have homeworks and assignments to deal with while trying to be active on NB. I know for a fact that it can be hard to join both lifes and still be successful. So, in order to try and make your time on NB more productive, I've created this thread for those struggling in the fields of mathematics and physic. Follow the template bellow and I'll be glad to help you with whatever problem you encountered during your studies. Just remember these things; I too make mistakes, challenge my answers if you feel I'm wrong, I am not all knowing so there are most likely questions I will not be able to asnwer. I'm only here to serve as a guideline when I know and understand the matter at hand.

1) First of all, either post the question or equation to your problem. You can use the website bellow to generate readable equations when necessary or simply take pictures of the problem directly from your book (or the notes you used to write down the problem) and post it here. Such effort from your part is appreciated since it's easier for me to understand the problem with a visual support.

Online Equation Editor

2) Explain what you don't understand.

3) Explain how you approached the problem and tried to solve it before coming to this thread. If I feel you haven't made any real effort and are simply giving me your homework to solve, I won't respond to your request.

This is charity people. I'm trying to help the members of this community so please don't spam or abuse this thread.

Furthermore, as I help solve your problems, the solutions will be included to this post. So, before asking for help please consult the solution library below.


Solutions Library:

NON-EXISTANT

*PLEASE DO NOT CONTACT ME VIA VM OR PM UNDER ANY CIRCUMSTANCES FOR ANYTHING RELATED TO THIS THREAD.
**Keep this thread clean so others can look through it without getting lost.
***Post as many pictures of your work as possible so I help you better.

[★saaaaaadpanda]

Create a proof that shows that no three positive integers a, b, and c can satisfy the equation a^n+b^n=c^n for any integer value of n greater than two.

[Izuna Uchiha]

Not to be rude but who tries to be active on NB?

Lots of members.

Stop spamming now, I don't want this thread to be filled with conversations lol.

Create a proof that shows that no three positive integers a, b, and c can satisfy the equation a^n+b^n=c^n for any integer value of n greater than two.

http://en.wikipedia.org/wiki/Fermat's_Last_Theorem

I'm not here to demonstrate equations or prove anything to anyone. If you don't need help than don't post here.

[Izuna Uchiha]

I cannot for the life of me figure out What keeps the electrons revolving around the nucleus of an atom.Help ?

http://lmgtfy.com/?q=what+keeps+an+e...nd+the+nucleus

Given this data set:

Televison, Physicians, and Life Expectancy

Country Life expectancy People/TV People/ physician Female life expectancy Male life expectancy

Argentina 70.5 4 370 74 67
Bangladesh 53.5 315 6166 53 54
Brazil 65 4 684 68 62
Canada 76.5 1.7 449 80 73
China 70 8 643 72 68
Colombia 71 5.6 1551 74 68
Egypt 60.5 15 616 61 60
Ethiopia 51.5 503 36660 53 50
France 78 2.6 403 82 74
Germany 76 2.6 346 79 73
India 57.5 44 2471 58 57
Indonesia 61 24 7427 63 59
Iran 64.5 23 2992 65 64
Italy 78.5 3.8 233 82 75
Japan 79 1.8 609 82 76
Kenya 61 96 7615 63 59
Korea, North 70 90 370 73 67
Korea, South 70 4.9 1066 73 67
Mexico 72 6.6 600 76 68
Morocco 64.5 21 4873 66 63
Myanmar (Burma) 54.5 592 3485 56 53
Pakistan 56.5 73 2364 57 56
Peru 64.5 14 1016 67 62
Philippines 64.5 8.8 1062 67 62
Poland 73 3.9 480 77 69
Romania 72 6 559 75 69
Russia 69 3.2 259 74 64
South Africa 64 11 1340 67 61
Spain 78.5 2.6 275 82 75
Sudan 53 23 12550 54 52
Taiwan 75 3.2 965 78 72
Tanzania 52.5 * 25229 55 50
Thailand 68.5 11 4883 71 66
Turkey 70 5 1189 72 68
Ukraine 70.5 3 226 75 66
United Kingdom 76 3 611 79 73
United States 75.5 1.3 404 79 72
Venezuela 74.5 5.6 576 78 71
Vietnam 65 29 3096 67 63
Zaire 54 * 23193 56 52




SOURCE:
_The World Almanac and Book of Facts 1993_ (1993), New York: *Pharos Books.




PEDAGOGICAL NOTES:
These data provide a useful context for students to discover the fundamental principle
that correlation does not imply causation. *They also give students an opportunity to
explore data transformations and to consider whether a causal connection is necessary
for one variable to be a useful predictor of another. *People per television is negatively
associated with life expectancy, and the log transformation makes it a slightly
better predictor of life expectancy than people per physician.

Find the variance of the hypergeometric distribution.

People! You don't seem to get the point of this thread. I'm not some Q&A guy , if you have random questions just google them. I'm here for real life assignments and problems. Tutoring would pretty much describe it. Please keep it on topic and stop posting random questions.

[Wesobi]

Okay people, it's pretty simple. Izuna is willing to help you guys out if you have a problem on the domain he's willing to help. Don't ask anything else if about it, just post your problem and say why you have a problem, what you don't understand, and what you have tried so far.

[Dihajum3]

This is good. I would love to help.

[kral]

hey if there is any math questions you can't answer and need help with i'll try to scan this as well.
i'm a math major and tutor so i know a few things.

[Calbackshoot3r]

Are you any good with Engineering Mathematics, or is this thread targeted for mostly middle and high school level stuff? If you're proficient in it (Engineering-tier stuff) then I would like for you to help with the problems I missed via red 'X' here.

I would tell (and show) you the method I used to find the answers but if you've never studied this type of stuff it would take way too long (series/parallel-combo circuity).

As a note, even though I took the test a few months back, I'm preparing for some exams and things like this tend to pop-up.

[Scary Yamato]

Are you any good with Engineering Mathematics, or is this thread targeted for mostly middle and high school level stuff? If you're proficient in it (Engineering-tier stuff) then I would like for you to help with the problems I missed via red 'X' here.

I would tell (and show) you the method I used to find the answers but if you've never studied this type of stuff it would take way too long (series/parallel-combo circuity).

As a note, even though I took the test a few months back, I'm preparing for some exams and things like this tend to pop-up.

Its been a couple of years, but I'll do my best to help with that. it was my major in college ^_^

Edit:
3) I believe the answer is 172 ohms. If R9 is shorted you would ignore the value of R10 since it would take the path of least resistance (across the short)
source: http://www.allaboutcircuits.com/vol_1/chpt_5/7.html

4 & 5) I did this quickly so double check my work. Breaking it into nodes, we have:
R1= 100
R6=12 since R2//3 is shorted (due to R2=0)
R457=40
making R6//457=9.23
R8910=96
Rt=100+9.23+96=205.23
Vt=440V
It=440/205.23=2.14A
Pt=2.14*440= 943.33W

[Calbackshoot3r]

R2, R3, R4, and R6 give me the most trouble here. It obviously wants you to break the circuit down like this:

R2 and R3 are in parallel so you have to create a R2,3 to put in series with 6 then parallel that with R4,5. Gets kind of complicated, but I think you're right on number 3 at least. Thanks for the help.

[Scary Yamato]

R2, R3, R4, and R6 give me the most trouble here. It obviously wants you to break the circuit down like this:

R2 and R3 are in parallel so you have to create a R2,3 to put in series with 6 then parallel that with R4,5. Gets kind of complicated, but I think you're right on number 3 at least. Thanks for the help.

Thats what I did. My advice is to check with some classmates. Then form/join a study group for the test. When you get a bunch of people together, someone is bound to know the answer.

[Ira]

any even-numbered can be presented as sum of 2 primes
for example
8=5+3
10=7+3
120=119+1

I can prove that.well, can you?

Please read the original post properly. Do not ask questions if you already know the answer. People are trying to help each other with genuine mathematical problems not challenging each other pointlessly. I am sure many people can just Google and reply that for you.

Such posts as yours in this thread are spam and will be infracted.

[kakashi owns all]

6y- 3= 6y + 3

i tried the normal way but if i - 6y then its gone so i dont know how to find what y is

[Scary Yamato]

6y- 3= 6y + 3

i tried the normal way but if i - 6y then its gone so i dont know how to find what y is

From what I can tell the equation has no solution. Are you sure the queation is written correctly?

[kakashi owns all]

yes i asked my teacher and she said she put it in just to see if any one would notice o_O + rep people that try ed :D

[Scary Yamato]

I guess thats one way to verify that people know what they are doing

⌐_⌐ ... it's still a dirty trick though

[bobisacoolguy]

What is the parent function of a parabola some one please help me

[Kraminka]

What is the parent function of a parabola some one please help me

By that, do you just mean the base function "x²"?

[-Severus Snape-]

Does anyone know how to get a general rule Matrics A^n where A = 1.....3
Does anyone know how to get a general rule Matrics A^n where A = 0....-1

[bobisacoolguy]

How do you make a sing wave on a graph (as in what equation) ex. Y=a^2+Bx+C is a parabola

[Scary Yamato]

How do you make a sing wave on a graph (as in what equation) ex. Y=a^2+Bx+C is a parabola

http://www.regentsprep.org/Regents/m...sinusoidal.htm