lim(1/x-1/e^x-1)x趋向于0+
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lim(1/x-1/e^x-1)x趋向于0+
lim(1/x-1/e^x-1)x趋向于0+
lim(1/x-1/e^x-1)x趋向于0+
lim(1/x-1/e^x-1)x趋向于0+
=lim(x->0+)(e^x-1-x)/x(e^x-1)
=lim(x->0+)(e^x-1-x)/x²
=lim(x->0+)(e^x-1)/2x
=lim(x->0+)(e^x)/2
=1/2
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