1. The problem statement, all variables and given/known data Using the u substutituion u = 2x + 1, ∫(2x + 1)1/2dx (when x goes from 0 to 2) is equivalent to? Answer: (1/2)*∫(u)1/2du (when x goes from 1 to 5) 2. Relevant equations 3. The attempt at a solution If u is 2x + 1, then du = 2dx. Thus, I get (1/2)*∫(u)1/2du (when x goes from 0 to 2) The only problem is where did the x goes from 1 to 5 come from? Did I do something wrong, or is the AP packet wrong?