Post-UTME Mathematics 2018 Objective — Question 3
Question 3 of 20 from the Post-UTME Screening (Post-UTME) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
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The sum of the first terms of the series 1/7 + 2/7 + 4/7 + ..... is
- A. 128/7
- B. 127/7Correct
- C. 128/14
- D. 127/21
Explanation
This is the sum of the finite geometric series (numerators 1,2,4,...,64) over 7 for 7 terms: (2^7-1)/7 = 127/7.
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