Question

Se considera functia f:(0, ∞)→R, f(x)=x³-3 ln x.
aratati ca f'(x)=3(x³-1)/x, x∈ (0, +∞)

Answer 1

f'(x)=( x^3)'-3(lnx)'=3x^2-3/x=3(x^3-1)/x