Question

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

Answer 1

$=( frac{1}{(1-x)(1+x)}- frac{1}{(1-x)^2} )* frac{(x-1)^2}{2}= \ \ =( frac{1-x-(1+x)}{(1-x)^2(1+x)} )* frac{(1-x)^2}{2}= frac{1-x-1-x}{1+x}* frac{1}{2}= \ \ = frac{-2x}{1+x}* frac{1}{2}= - frac{x}{1+x}= - frac{-1.5}{1-1.5}= frac{1.5}{-0.5}=-3$