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If the co-efficient of x^(9) in (alphax^...

If the co-efficient of `x^(9)` in `(alphax^(3)+(1)/(beta x))^(11)` and the co-efficient of `x^(9)` in `(alpha x-(1)/(betax^(3)))^(11)` are equal,then `(alpha beta)^(2)` is equal to..........

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