Mathematics - 16 September 2006

If x=y
Multiply by ( x ) -> x^2 = xy
Subtract (y^2) -> (x^2 – y^2) = (xy – y^2)
-> (x-y)(x+y)=y(x-y)
(x-y) cancels from both sides
-> x+y=y
-> y+y = y
-> 2y=y
-> 2=1
????????

2006-09-16 23:59:55 · 6 answers · asked by Anas 3

Is there a SIMPLE formula for determining if an UNKNOWN number is odd or even? If "unknown number = n," then n / 2 doesn't work if n is equal to 1. Get it?

2006-09-16 23:20:02 · 9 answers · asked by The Baron 3

A(-4;-1), B(1;4), C(3; -5), D(-2;-4), E(3;-3),F(1;-1), G(3;5), H(-2;-3) and K(-2;5). which three points lie on a straight line, which four points form a parallelogram, what else can be deduced from the given points. show all calculations and provide an explanation of your method.

2006-09-16 23:18:01 · 2 answers · asked by Evie 1

Please list the steps involved

2006-09-16 23:03:24 · 6 answers · asked by teacher's pet 2

Simplify
2x - 3 [ 2 (x - 2y) - (x - y) - 3] + 7

2006-09-16 21:37:40 · 12 answers · asked by Anonymous

is it possible to solve the below question with log

3^x+1 + 3^x +3 ^x-1 is divisble by 13 for all integers n.

if so, plz solve it

2006-09-16 21:37:24 · 3 answers · asked by edwinvandesar 1

hi . . the question is this ...
integral of (x^3).(e^(x^2)) ... hope u will get the question .
x power 3 multiplied by . e power x power 2... here 2 is the power of x and .. x^2 is the power of e .. this is the question .and integrate it by . the integration by parts method .. plzz . do it quickly

2006-09-16 21:22:11 · 6 answers · asked by g.revolution 1

To be honest, I don't know what arctan is exactly, in relation to the other trig functions. Can anyone clue me in? I'm studying for a Cal II test, and the trig is bogging me down!

2006-09-16 20:47:27 · 6 answers · asked by kacey 5

2006-09-16 20:45:18 · 25 answers · asked by Abhinav Kumar 1

Can anyone tell me how to read measurements with a .? For example, where is 4.9 inches on a ruler or tape measurer? Or .2 or .25, .7, .75, .84 on a ruler? I don't get it.

2006-09-16 20:44:10 · 10 answers · asked by bb little 2

2006-09-16 20:18:25 · 52 answers · asked by Anonymous

I'm doing some work on Differentiable Manfold theory, and I came across a problem that I'm having a little trouble on so I thought "Why not post it?" Anyways, the question asks to show that the set of all lines in R^2 (note: NOT just lines through the origin, but ALL lines) is a differentiable manifold, and then asks what (already familiar) manifold it is. The latter is (RP^2)-{a point}, and I can show that identification without too much trouble. But I was wondering if anyone knows how to *carefully* show that the set of all lines in R^2 is a manifold (coordinate patches would be awesome). Thanks!!

2006-09-16 20:04:24 · 2 answers · asked by wlfgngpck 4

2006-09-16 19:40:31 · 17 answers · asked by Just_for_fun 3

how to find the last four digits of 7^(7^7)?

2006-09-16 19:28:54 · 18 answers · asked by Anonymous

what is the integral of [1/(1+x^3)] dx from 0 to 3
please show your work so I can understand
thanks soooo much

2006-09-16 18:33:17 · 11 answers · asked by Anonymous

integrate sinx + cosx by sin to the power 4x + cos to the power 4x

2006-09-16 18:29:49 · 11 answers · asked by rashmi s 1

And can you solve it??

2006-09-16 18:17:24 · 6 answers · asked by ashcatash 5

2006-09-16 17:57:27 · 11 answers · asked by thebournesupremacy04 1

Exemples would be helpful.
Exemples of the same theorem demonstrated by the constructive and formalist way would be very nice.

2006-09-16 17:37:59 · 3 answers · asked by Dante 2

((x/7-1/2)=(x-11/2))

((6/3x-2)+(3/2x))

Thanks!

2006-09-16 17:29:04 · 5 answers · asked by Anonymous

2006-09-16 17:28:52 · 21 answers · asked by sixuan94 1

2006-09-16 17:25:09 · 3 answers · asked by the_suffering420 1

2006-09-16 17:14:18 · 5 answers · asked by the_suffering420 1

This ((x+2/x)/(x-2/3x)), or
this (x^2-25y^2/5x^2+25y)/(x^2-5xy)

2006-09-16 17:11:20 · 3 answers · asked by Anonymous

I am really horrible at Math. Could I get some help? Complex fractions
((m^3/7)/(m^7/28))
I came up with 4^4.
Did anyone else?

2006-09-16 16:30:41 · 8 answers · asked by Anonymous

2006-09-16 16:15:25 · 8 answers · asked by Chris M 2

2006-09-16 16:09:50 · 7 answers · asked by Roberto 2

If one-half a number is sibtracted from five-sixths of the number, the difference is six. Find the number.

2006-09-16 16:04:50 · 6 answers · asked by Anonymous

just asking because later on i might have questions of geometry because im taking that class , fyi im a jr. in high school and hate math, well at first its alright i understand the equations,problems,formulas,etc. but they keep adding new things or making difficult and well i give up but i have to pass this class so next year ill have algebra 2, in oklahoma u need to have 3 credits of math so i need 3 to graduate and if i want to i can have calculus but maybe i wont take it cus its 2 difficult for me, anyways thats all, later on ill ask questions, and sorry if i type too many details!!!!

2006-09-16 16:04:17 · 6 answers · asked by panchito 1

2006-09-16 16:00:35 · 10 answers · asked by shree30 1