I am trying to determine the limit limx→0−−e1/xx. Plugging in x directly, yields 0/0 which is indeterminate. Applying L'Hopitals rule does not simplify the fraction, in fact the result is even more complicated and looks like a dead end, i.e. limx→0−−e1/xx=limx→0−e1/xx2.
So I tried taking the natural log, i.e.
y=limx→0−−e1/xx
ln(y)=limx→0−ln(e1/x−x)=limx→0−[1/x−ln(−x)]=limx→0−1−xln(−x)x
Applying L'Hopitals Rule here gives me
limx→0−−1−ln(−x)=+∞ which is wrong; it should be −∞.
I think I am making a very simple mistake but I don't see it.
Can anyone help?
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