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JAMB Mathematics 2002 Question 23

Question 23

Binary Operations

An operation * is defined on the set of integers p and q by p * q = pq + p + q. Find 2 * (3 * 4).

  1. A.59
  2. B.19
  3. C.67
  4. D.38
Show the answer and explanation

Answer: A (59)

Explanation

First 3 * 4 = 12 + 3 + 4 = 19. Then 2 * 19 = 38 + 2 + 19 = 59.