limx趋向0 (e-(1+x)^1/x )/x 求极限
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limx趋向0(e-(1+x)^1/x)/x求极限limx趋向0(e-(1+x)^1/x)/x求极限limx趋向0(e-(1+x)^1/x)/x求极限lim(x->0)(exp(1)-(1+x)^(1
limx趋向0 (e-(1+x)^1/x )/x 求极限
limx趋向0 (e-(1+x)^1/x )/x 求极限
limx趋向0 (e-(1+x)^1/x )/x 求极限
lim(x->0)(exp(1)-(1+x)^(1/x))/x
=lim(x->0)(exp(1)-exp(1)exp(ln(1+x)/x-1))/x
=lim(x->0)exp(1)(1-exp(ln(x+1)/x-1))/x
利用等价无穷小
=lim(x->0)exp(1)(-(ln(x+1)/x-1))/x
=lim(x->0)exp(1)(x-ln(x+1))/x^2
利用洛必达法则
=lim(x->0)exp(1)(1-1/(x+1))/(2x)
=lim(x->0)exp(1)/(2(x+1))
=exp(1)/2
遇到极限一般是用等价无穷小和洛必达法则,然后遇到指数一般用对数转化.
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