# determine where it is concave up and where it is concave down. Also ﬁnd all the inﬂection points, i.e. points where the second derivative changes sign (i.e. goes from being positive to being negative, or vice versa):f(z) = 3z^2− 1/(z^2 )

Question

determine where it is concave up and where it is concave down. Also ﬁnd all the inﬂection points, i.e. points where the second derivative changes sign (i.e. goes from being positive to being negative, or vice versa):
f(z) = 3z^2− 1/(z^2 )