Originally Posted by
angrynapkin mr fantastic, thank you for your reply. I've worked through the problem and studied notes a little more carefully. The second derivative test returns concave upward for all real values, which is correct according to the graph of the original function.
f"(x) = 4e^(2x^2)[(1+4x^2)]
I set 1+4x^2 to zero as my two critical points and tested away.
Not too sure how you evaluated 4xe^(2x^2) = 0
From the graph, I know it has to be zero, but algebraically I'm not quite sure how to work that out (other than the assumption it HAS to equal zero)