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`lim_(x->oo)(1/e-x/(1+x))^x` is equal to (a) `e/(1-e)` (b) 0 (c) `e/(e^(1-e))` (d) does not exist

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CENGAGE PUBLICATION-LIMITS AND DERIVATIVES-All Questions
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  14. Evaluate the following limits using sandwich theorem: lim(x->oo)([x])...

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