JAMB Mathematics 2013 Question 21

Question 21

Binary Operations

If a binary operation * is defined by x * y = x + 2y, find 2*(3*4)

  1. A.14
  2. B.26
  3. C.24
  4. D.16
Show the answer and explanation

Answer: C (24)

Explanation

3 * 4 = 3 + 8 = 11, then 2 * 11 = 2 + 22 = 24.