1. The problem statement, all variables and given/known data Suppose f and g are functions. Assume that f is differentiable and f(1) = 2, f'(1)=4 and that g(x) = x^4 -x+1. Use this information to calculate: (fg)'(1) (f o g)'(1) 2. Relevant equations 3. The attempt at a solution I'm unsure of what this wants me to do Does it want me to multiply the derivatives of f and g together and calculate it at 1 or does it want me to multiply f and g then find the derivative and plug in 1. For the 2nd one I found the derivative of g(x) to be 4x^3 -1 plugged a 1 into that and got 3 now i have f'(3) = ? how can i know that when they only gave me f(1) and f'(1) ?