Question

Найти вторую производную функции.

Answer 1

f(x)=(x⋅2+cos(x+5))′==(x⋅2)′+(cos(x+5))′==2+(−sin(x+5))⋅(x+5)′==2+(−sin(x+5))⋅1==2+(−sin(x+5))
ответ- f(x)=2+(−sin(x+5))
Правильно?)

Answer 2

f′(x)=(x⋅2+cos(x+5))′=(x⋅2)′+(cos(x+5))=2(−sin(x+5))⋅(x+5)′=2(−sin(x+5))⋅1=
=2+(−sin(x+5))