Discussion

Explanation:

Maximum sum will occur when last term is 0 or 2 (since after that terms will be -ve which will start reducing the sum)

∴ Last term = 0 = 52 + (n – 1)(-2) 

⇒ n = 27

∴ Smax = 27/2 × [52 + 0] = 702.

Hence, option (b).

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