lim(x->0) (sin x+cos x)^(1/x)
=lim(x->0) e^ {ln[(sin x+cos x)^(1/x)]}
=lim(x->0) e^ {ln[(sin x+cos x)}/x
= e^lim(x->0) {ln[(sin x+cos x)}/x
= e^lim(x->0) {(cosx-sinx)/(sin x+cos x)}/1
= e^{(1-0)/(0+1)}
= e^1
lim(sin x+cos x)^(1/X)(X趋近于零)
lim(sin x+cos x)^(1/X)(X趋近于零)
数学人气:713 ℃时间:2020-04-08 18:16:50
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