Looks good to me.
Thanks you for replying. Perhaps you can further help me with this problem. The answer continues to evade me.I am trying to find the critical points of the equation. The book says to find the critical points, set f' = 0 .
According to mathlab, I should get critical points at x=-1 and x=1.
Unfortunately, I have been trying, unsuccessfully for hours, to see how Y' or
= 0 gives me a X=-1 and X=1
Can you help me?