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UPSC NDA 2 2022 Mathematics Solved Paper

Consider the following for the next three (03) items that follow :
Let P be the sum of first n positive terms of an increasing arithmetic progression A. Let Q be the sum of first n positive terms of another increasing arithmetic progression B. Let P:Q=(5n+4):(9n+6)

[NDA II 2022]

Question : 21

Total: 120

If d is the common difference of A, and D is the common difference of B, then which one of the following is always correct ?

[NDA II 2022]

D>d
D<d
7D>12d
None of the above

Validate

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