\text{ What is } S_{3 n}: S_{n} \text{ equal to? } [NDA II 2014]

UPSC NDA II 2014 Mathematics Paper

For the next two (02) items that follow:
Let Sn denote the sum of first n terms of an AP and 3Sn=S2n

[NDA II 2014]

Question : 46 of 120

Marks: +1, -0

‌ What is ‌S3n:Sn‌ equal to? ‌

[NDA II 2014]

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