NDA 2021 Mathematics question

If the first term of an AP is 2 and the sum of the first five terms is equal to one-fourth of the sum of the next five terms, then what is the sum of the first ten terms?

(A)
(B)Correct
(C)500
(D)250

Answer: (B)

Solution

Let the common difference be ; . and . Sum of the next five terms . Given

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Question ID VK-033539