Since you don't need the full answer, here are a couple hints: - dy/dx is the first derivative - (d²y) / (dx²) is just the second derivative - The subscript "x=1" means to find the derivative when x is 1 - X is function of x - Plug in X into (X² + 3)², the result should be in terms of x - If the derivatives were calculated properly, the last part of the question should be able to be proved easily.