Question

СРОЧНОСРОЧНОСРОЧНО! ДАМ 49 БАЛЛОВ!

Answer 1

$f'(x)=2*cos( frac{x}{2})'*( frac{x}{2})'=2*-sin (frac{x}{2})* frac{1}{2} =-sin frac{x}{2}$
$f'( frac{pi}{3})=-2sin frac{pi}{6}=-2* frac{1}{2}=-1$