OAU Post-UTME Mathematics 2013 Question 20

Question 20

Algebraic Expressions

Given f(x) = 3 + x and g(x) = 3 − x, find g[f(x)].

  1. A.6
  2. B.x
  3. C.−x
  4. D.0
Show the answer and explanation

Answer: C (−x)

Explanation

g(3 + x) = 3 − (3 + x) = −x.