t dt 3. You want to find the derivative of G(x) = / + + 1, and use it to analyze G(x). (a) Review: Let f be a continuous function. The area function with a lower limit a: A(a) = [x f(t) dt. Then A'(x) is t dt (b) Now let A(u) = What is A'(u)? t+1 (c) Find a function g(x) such that G(x) = A(g(x)). (d) Use the chain rule to calculate G'(x)