WAEC Mathematics 1988 Question 4

Question 4

Progressions

Find the 8th term of the A.P. −3, −1, 1, ...

  1. A.13
  2. B.11
  3. C.−8
  4. D.−11
  5. E.−17
Show the answer and explanation

Answer: B (11)

Explanation

First term a = −3 and common difference d = 2, so T8 = a + 7d = −3 + 14 = 11.