Question

найти производную y=x+1/x-1

Answer 1

$\y=frac{x+1}{x-1}\ y'frac{x-1-(x+1)}{(x-1)^2}\ y'=frac{x-1-x-1}{(x-1)^2}\ y'=-frac{2}{(x-1)^2}$