JAMB 2011 · UTME · Q39

Evaluate ∫01(3−2x) dx\displaystyle\int_0^1 (3 - 2x)\,dx.

Worked solution (try it first)
  1. Integrate: [3x−x2]01\left[3x - x^2\right]_0^1.
  2. At x=1x = 1: 3−1=23 - 1 = 2.
  3. At x=0x = 0: 0.
  4. So the integral is 2, option C.

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