Question

Найти производные функции: x=7t+cos3t2

Answer 1

$x = 7t + \cos 3t^{2}$

$x' = (7t)' + (\cos 3t^{2})' = 7 +3 \cdot 2t \ \cdot (-\sin 3t^{2}) = 7 - 6t \sin 3t^{2}$