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UI Post-UTME Mathematics 2014 Question 21

Question 21

Progressions

The first and twenty eight terms of an Arithmetic progression are −14 and −5 respectively. find its common difference

  1. A.−3
  2. B.−1/3
  3. C.1/3
  4. D.1⅖
Show the answer and explanation

Answer: C (1/3)

Explanation

−14 + 27d = −5, so d = 9/27 = 1/3.