Question

x^2*cos(x) найти производную

Answer 1

Ответ:

$y = {x}^{2} \cos(x)$

$y' = ( {x}^{2} )' \cos(x) + ( \cos(x) )' \times {x}^{2} = \\ = 2x \cos(x) - {x}^{2} \sin(x)$