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1^{2} + (1^{2} + 2^{2}) + (1^{2} + 2^{2} + 3^{2}) +

............. ধারাটির n তম পদ ।

\frac{1}{16} n (n + 1) (2 n + 1)

6 n (n + 1) (2 n + 1)

\frac{1}{6} n (n + 1) (2 n + 1)

\frac{1}{12} n (n + 1) (2 n + 1)

ANS : 3

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