WAEC Mathematics 2014 Objective — Question 48
Question 48 of 50 from the West African Examinations Council (WAEC) Mathematics 2014 Objective paper, with the correct answer and a full explanation.
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Find the number of terms in the Arithmetic Progression (A.P) 2, −9, −20, …, −141.
- A. 11
- B. 12
- C. 13
- D. 14Correct
Explanation
Common difference d=−11. Using Tn=a+(n−1)d: −141=2+(n−1)(−11), solving gives n=14.
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