Question

Даю много баллов,помогите!!!

Answer 1

1) f'(x) = 15x² - 8x
f'(2) = 60 - 16 = 44

2) f'(x) = 3cosx - sinx + 1/sin²x
f'(π/2) = 0 - 1 + 1 = 0

3) f'(x) = 12x² - 12x = 0
x(x-1) = 0
x = 0 U x = 1

4) f'(x) = -2sinx + √3 = 0
sinx = √3/2
x = (-1)ⁿ*π/3 + πn, n∈Z