Problem: Find the limit of ln(1+e^x)/e^x as x approaches negative infinity(adsbygoogle = window.adsbygoogle || []).push({});

I really have no idea how to do this kind of limit, so I guessed. I tried to substitute u=e^x to get ln(1+u)/u as u approaches negative infinity, then applying l'hopital's rule and eventually ended up with 1/negative infinity which is zero. This wasn't the right answer (which was 1). Appearently what I did wasn't the right thing, so what is the right way for this kind of problem?

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# Limits again

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