Intro to Calculus - Check in Review

Find the derivative f(x) = x²/e^x

Find the SECOND derivative of

f(x) = x² + e^x - cosx

Find the derivative of 
 $f\left(x\right)=xe^x$  

Find the slope at x = 3 of the equation f(x) = 3x²

Find dy/dx by Implicit Differentiation

x³ +y³ = 36

 $\lim_{x\rightarrow11}\ \ \frac{x^2-121}{x-11}\ =\ ....$