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\frac{1}{(1 - x) (3 - x)}

x^{10}

এর সহগ হবে -

\frac{1}{2} [1 + 3^{- 11}]

\frac{1}{2} [1 - 3^{- 11}]

\frac{1}{2} [1 - 3^{10}]

\frac{1}{2} [1 + 3^{10}]

ANS : 2

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