Question29 Mark for Review Auto saved at: 21 :40:44
The first derivative of the function $h$ is given by $h^{\prime}(x)=x^{5}-3 x^{2}+x$. What are all intervals on which the graph of $h$ is concave down? (A) $(-\infty, 0)$ and $(0.338,1.307)$ (B) $(-\infty, 0.669)$ (C) $(-\infty, 0.167)$ and $(1, \infty)$ (D) $(0.167,1)$