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lim[e^x-e^(-x)]/x在x趋向于0时候的极限不用洛比达法则
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lim[e^x-e^(-x)]/x在x趋向于0时候的极限 不用洛比达法则
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那就用lim(x->0) (e^x-1)/x = 1咯
lim (e^x - e^-x) / x
=lim (e^x - 1/e^x) / x
=lim (e^2x - 1) / xe^x
=2*lim (e^2x - 1) / 2x * lim 1/e^x
=2*(1)*1/(1)
=2
lim (e^x - e^-x) / x
=lim (e^x - 1/e^x) / x
=lim (e^2x - 1) / xe^x
=2*lim (e^2x - 1) / 2x * lim 1/e^x
=2*(1)*1/(1)
=2
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