Gce Model Questions Vol1 2021 Mathematics Question 21
Practice objective / multiple choice question 21 from the 2021 Gce Model Questions Vol1 Mathematics examination.
The sequence \((a_n)\) is arithmetic. It satisfies that the sum of the first five terms equals twice the fifth term, and the sum of the first five terms is 80. Find the common difference \(d\) and the first term \(a_1\), then give the sum of the first twelve terms.
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About This Question
This is Gce Model Questions Vol1 2021 Mathematics Question 21. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Mathematics examination.
Difficulty level: Medium .
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