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lim(X->0)(tanX一SinX)/(X^3)=
人气:355 ℃ 时间:2020-03-17 00:00:01
解答
lim(X->0)(tanX一SinX)/(X^3)
=lim(X->0)tanx(1-cosx)/(X^3)
=lim(X->0)x(x^2/2)/(X^3)
=1/2lim(X->0)(X^3)/(X^3)
=1/2
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