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UPSC NDA 2 2022 Mathematics Solved Paper

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Consider the following for the next three (03) items that follow :
Let PP be the sum of first nn positive terms of an increasing arithmetic progression AA. Let QQ be the sum of first nn positive terms of another increasing arithmetic progression BB. Let P:Q=(5n+4):(9n+6)P: Q=(5 n+4):(9 n+6)
[NDA II 2022]
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