Answer: x + C.
- A 0 + C
- B x + C
- C 1 + C
- D x²/2 + C
Correct answer: B. x + C
Explanation: x⁰ = 1. Integral of 1 = x + C.
The exact area under the curve from a to b (shaded) is approximated by a few rectangles, the Riemann sum idea behind the definite integral.