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2^{3} + 4^{3} + 6^{3} + 8^{3} + . . . . . . + (2 n - 2)^{3}

এর যোগফল-

2^{2} \times {n (n + 1) / 2}^{3}

2^{3} \times {n (n - 1) / 2}^{3}

2^{2} \times {n (n - 1) / 2}^{2}

2^{3} \times {n (n + 1) / 2}^{2}

ANS : 4

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