116- What is the minimum value of the function $f(x) = x + \sqrt[3]{x^2 - x^3}$? (1) $-\dfrac{1}{9}$ (2) $-\dfrac{1}{6}$ (3) $-\dfrac{1}{3}$ (4) zero
116- What is the minimum value of the function $f(x) = x + \sqrt[3]{x^2 - x^3}$?
(1) $-\dfrac{1}{9}$ \hfill (2) $-\dfrac{1}{6}$ \hfill (3) $-\dfrac{1}{3}$ \hfill (4) zero