WAEC Further Mathematics 2023 Question 23

Question 23

Binomial Theorem

Find the fifth term in the binomial expansion of (q + x)7.

  1. A.21q4x3
  2. B.35q5x2
  3. C.35q3x4
  4. D.21q2x2
Show the answer and explanation

Answer: C (35q3x4)

Explanation

The fifth term is ⁷C₄ q³x⁴ = 35q³x⁴.