Sunday, 2 February 2014

limits without lhopital - Find limxto0frace2x1tanx

I'd like help finding



lim




without the use of L'Hôpital's rule.



So far I did this:



\lim_{x \to 0} \frac{e^{2x}-1}{\tan x}
=\lim_{x \to 0} \frac{\cos x(e^{2x}-1)}{\sin x}
=\lim_{x \to 0} \frac{x\cos x(e^{2x}-1)}{x\sin x}
=\lim_{x \to 0} \frac{\cos x(e^{2x}-1)}{x}




Basically I got nowhere. Any hints or partial solutions to help me?



By the way, the is the 1969 AP BC Multiple Choice #28.

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