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WAEC Further Mathematics 2020 Question 22

Question 22

Binomial Theorem

If the binomial expansion of (1 + 3x)6 is used to evaluate (0.97)6, find the value of x.

  1. A.0.03
  2. B.0.01
  3. C.−0.01
  4. D.−0.03
Show the answer and explanation

Answer: C (−0.01)

Explanation

1 + 3x = 0.97, so 3x = −0.03 and x = −0.01.