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\frac{2 x}{(x - 1) (x^{2} + 1)} \equiv \frac{A}{x - 1} + \frac{B (x + 1)}{x^{2} + 1}

অভেদে A ও B এর মান কত?

A=1, B=1

A=-1, B=-1

A=1, B=-1

A=-1, B=1

ANS : 4

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