Neco 2017 Mathematics Question 45

Practice objective / multiple choice question 45 from the 2017 Neco Mathematics examination.

Neco 2017 Mathematics Objective / Multiple Choice Medium Difficulty
Question 45 NECO • 2017 • MATHEMATICS • objective

The sum of the first \(n\) terms of a geometric series is 124 and the sum of the first \(2n\) terms is 1240. Find the common ratio \(r\) (with \(r\neq1\)) and the first term \(a\).

Answer Options

A. r = 2, a = 31
B. r = 3, a = 30
Correct Answer C. r = 3, a = 31
D. r = -3, a = 31
Correct Answer
C
Correct Option:
r = 3, a = 31

About This Question

This is Neco 2017 Mathematics Question 45. It is one of the objective questions from the 2017 Neco Mathematics examination.

Difficulty level: Medium .

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