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求lim(x→0)xcotx的极限
人气:251 ℃ 时间:2019-12-10 10:47:05
解答
lim(x→0)xcotx=lim(x→0)xcosx/sinx
=lim(x→0)x/sinx * lim(x→0)cosx
=1*1
=1
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