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UI Post-UTME Mathematics 2018 (Model questions) Question 12

Question 12

Progressions

The first term of an arithmetic progression is 8. If the tenth term doubles the second term, find the common difference

  1. A.8/7
  2. B.4/3
  3. C.1
  4. D.7/8
Show the answer and explanation

Answer: A (8/7)

Explanation

8 + 9d = 2(8 + d) gives 7d = 8, d = 8/7.