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怎么解lim[(sinx-tanx)/x^3]=
人气:322 ℃ 时间:2020-05-07 12:53:14
解答
=lim (sinx /x)·[(1-1/cos x)/x²]
=1·lim[(cosx -1)/x²]
=lim[-(x²/2) /x²]
= -1/2
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