passwella.
Menu

WAEC Mathematics 2019 Question 43

Question 43

Progressions

The fourth term of an Arithmetic Progression (A.P.) is 37 and the first term is −20. Find the common difference.

  1. A.63
  2. B.57
  3. C.19
  4. D.17
Show the answer and explanation

Answer: C (19)

Explanation

T4 = a + 3d, so −20 + 3d = 37, 3d = 57 and d = 19.