lim((1+x)^(1/x)/e))^(1/x) x趋近于0
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lim((1+x)^(1/x)/e))^(1/x) x趋近于0
![lim((1+x)^(1/x)/e))^(1/x) x趋近于0](/uploads/image/z/15769340-44-0.jpg?t=lim%28%281%2Bx%29%5E%281%2Fx%29%2Fe%29%29%5E%281%2Fx%29+x%E8%B6%8B%E8%BF%91%E4%BA%8E0)
lim(x->0) [(1+x)^(1/x) / e ]^(1/x)
=lim(x->0) [(1+x)/ e^x ]^(1/x^2)
let
L = lim(x->0) [(1+x)/ e^x ]^(1/x^2)
lnL = lim(x->0) ln[(1+x)/ e^x ] / x^2
=lim(x->0) [ ln(1+x) - x ] / x^2 (0/0)
=lim(x->0)[ 1/(1+x) -1]/(2x)
=lim(x->0) -1/[2(1+x)]
= -1/2
L = e^(-1/2)
=lim(x->0) [(1+x)/ e^x ]^(1/x^2)
let
L = lim(x->0) [(1+x)/ e^x ]^(1/x^2)
lnL = lim(x->0) ln[(1+x)/ e^x ] / x^2
=lim(x->0) [ ln(1+x) - x ] / x^2 (0/0)
=lim(x->0)[ 1/(1+x) -1]/(2x)
=lim(x->0) -1/[2(1+x)]
= -1/2
L = e^(-1/2)
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