Graphing Critical Numbers

Find and classify the critical points of the following function

$f(x) = x^3 - 3x^2 - 9x + 2$

$y = x^{2/3}(2-x)$

Find: A. The critical values of x? B. The x coordinate of the local maximum

Find the inflection points for the following function and determine intervals of concave up and concave down on the graph

$f(x) = \ln{(1 - \ln{(x)})}$

Find the inflection points and intervals of concavity for the following function

$y = \frac{x^2 + 1}{x^2}$