Let f(x) =x2ecosx. Write the limit definition of df/dx I x=π. Do not evaluate thelimit, do not compute the derivative.

Answer 1

We derive formulas for the derivatives of simple functions, products, quotients and then the chain rule so that we NEVER have to do problems like this!!!!!

However, the answer is: limit as x->π [(x+h)²e^cos(x+h)-x²e^{cos x}}/(x+h)