Hello,

I'm a bit rusty on my calculus and I have this function and when I use the chain rule I get the f'(x) function

http://img179.imageshack.us/img179/382/untitled1qx1.gif

I must be doing something wrong though as when x = 9.17, the dy/dx value should be about 16 but it ends up being about .33 something. Can anyone point out where I went wrong? Thanks in advance.