JEE Advanced 2015 Paper 2 Mathematics Q5

Mathematics

Problem

Let mm and nn be two positive integers greater than 11. If lim⁡α→0(ecos⁡(αn)−eαm)=−(e2),\lim_{\alpha\to0}\left(\frac{e^{\cos(\alpha^n)}-e}{\alpha^m}\right)=-\left(\frac e2\right), then the value of mn\dfrac mn is

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