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WAEC Further Mathematics 2014 Question 30

Question 30

Sequences and Series

The first term of a linear sequence is 9 and the common difference is 7. If the nth term is 380, find the value of n.

  1. A.45
  2. B.54
  3. C.56
  4. D.65
Show the answer and explanation

Answer: B (54)

Explanation

9 + 7(n − 1) = 380, so n − 1 = 53 and n = 54.