Question

1/sqrt(x^2+1) Найти производную.

Answer 1

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