WAEC Further Mathematics 2022 Question 10

Question 10

Integration

Evaluate ∫01 x2(x3 + 2)3 dx.

  1. A.56/12
  2. B.65/12
  3. C.12
  4. D.65
Show the answer and explanation

Answer: B (65/12)

Explanation

Let u = x³ + 2, du = 3x² dx: ∫ = (x³ + 2)⁴/12 from 0 to 1 = (81 − 16)/12 = 65/12.