4.5 The Fundamental Theorem of Calculus Contemporary Calculus In problems 3 -8 , evaluate A'(x) at x = 1, 2, and 3. 3. A(x) = | 2r dt 4. A(x) = | 2r dt 5. A(x) = | 27 dt 0 -3 X X 6. A(x) = J (3-1 2) dt 7. A(x) = sin(f) dt 8. A(x) = | It - 21 dt 0