OAU Post-UTME Mathematics 2014 Question 15

Question 15

Integration

Given ∫−aa15x2dx = 3430, find the value of the constant a.

  1. A.8
  2. B.6
  3. C.7
  4. D.9
Show the answer and explanation

Answer: C (7)

Explanation

[5x³] from −a to a = 5a³ + 5a³ = 10a³ = 3430, so a³ = 343 and a = 7.