Найти f´(3) и f´(1) Если :f(x)=1/x3 + 1/x2

Question

Найти f´(3) и f´(1)
Если :f(x)=1/x3 + 1/x2

Answer 1

F(x)=1/x3 + 1/x2=x⁻³ + x⁻²
f'(x) = -3x⁻⁴ -2x⁻³ = -3/х⁴ - 2/х³
f'(3) = -3/81 - 2/27 = -1/27 -2/27 = -3/27 = -1/9
f'(1) = -3 -2 = -5