Question

4. If A= (x+1)/(x-1) and B= (x-1)/(x+1) then
A – B = 4. If A= (x+1)/(x-1) and B= (x-1)/(x+1) then
A – B = @Mathematics

Answer 1

(x+1)/(x-1) - (x-1)/(x+1)
(x+1)-(x-1)/x^2-1
=2/x^2-1

Answer 2

2 in terms of x

Answer 3

what ?

Answer 4

I too got same answer but in answer key it's given 4x/x^2-1

Answer 5

oh sorry thats wrong

Answer 6

I got it. I made a mistake in sign.
Aditi it's - of (x-1)^2

Answer 7

Yep , I got it =) sorry for the wrong Answer

Answer 8

let's see:

x+1/x-1 - x-1/x+1
={( x^2 + 2x + 1) - (x^2 - 2x+1)} / x^2 - 1
= {2x - (-2x)}/x^2-1
= 4x / x^2-1

Answer 9

no problem Aditi. Thanks to both of you..

Answer 10

U're welcome..