OAU Post-UTME Mathematics 2021 (Batch B) Question 18

Question 18

Binary Operations

An operation * is defined on the set of real numbers R such at if x, y ∈ R, then x * y = (x + y)/3. Find ½ * ½.

  1. A.1/3
  2. B.1/2
  3. C.0
  4. D.−1/2
Show the answer and explanation

Answer: A (1/3)

Explanation

(½ + ½)/3 = 1/3.