Найдите значение f'(0) и f'(2) если 1) f(x) =-x^2-2x 2) f(x) =-x^3+x^2 3) f(x) =x^2+x+1 решить

1) f'(x) = -2x - 2
f'(0) = -2 * 0 - 2 = -2
f'(2) = -2*2 - 2 = -6

2) f'(x) = -3x^2 + 2x
f'(0) = -3*0 + 2* 0 = 0
f'(2) = -3*2^2 + 2*2 = -12 + 4 = -8

3) f'(x) = 2x + 1
f'(0) =  2*0 + 1 = 1
f'(2) = 2*2 + 1 = 5