NDA 2025 Mathematics question
The sum of the first terms of a series is . Which one of the following is correct?
- (A)The terms of form an arithmetic progression with common difference 14.
- (B)The terms of form an arithmetic progression with common difference 6.Correct
- (C)The terms of form a geometric progression with common ratio 10/7.
- (D)The terms of form a geometric progression with common ratio 11/4.
Answer: (B)
Solution
Let . The th term is . So the terms
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Question ID VK-030012