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Question

2^{2} + 4^{2} + 6^{2} + . . . . . . . . . . + (2 n)^{2}

এর মান কত ?

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

2/3n(n+1)(2n+1)

3/2n(n+1)(2n+1)

n(n-1)(2n+1)

ANS : 2

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