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("lim")(n vec oo)"{"(n/(n+1))^(alpha)+si...

`("lim")_(n vec oo)"{"(n/(n+1))^(alpha)+sin (1/n)]^n`(when `alpha in Q`) is equal to (a) `e^(-alpha)` (b) `-alpha` (c) `e^(1-alpha)` (d) `e^(1+alpha)`

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