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WAEC Further Mathematics 2007 Question 4

Question 4

Sequences and Series

The sum of the first three terms of an Arithmetic Progression (A.P.) is 18. If the first term is 4, find their product

  1. A.130
  2. B.192
  3. C.210
  4. D.260
Show the answer and explanation

Answer: B (192)

Explanation

3a + 3d = 18 with a = 4 gives d = 2, so the terms are 4, 6, 8 and their product is 192.