Question

1)y=1/1+x^2; 2)y=2sinx найти производную.

Answer 1

$1)y=1/(1+x^2) \ y'=( frac{1}{(1+x^2)^2)} )'= frac{(1+x^2)-(2x)}{(1+x)^2} = frac{x^2-2x+1}{(1+x^2)^2}= frac{x^2-2x+1}{x^4+2x^2+1}$
$2)y=2sinx \ (uv)'=u'v+uv' \ y'=2cosx$