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- \frac{1}{2} - \frac{1}{2 . 2^{2}} - \frac{1}{3 . 2^{3}} - \frac{1}{4 . 2^{4}} - . . . . . . .

..... ধারাটির সমষ্টি -

- 2 In 2

- In 2

- 2 e

-e

ANS : 2

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