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limx趋向0 ln(cosx)/x^2
人气:187 ℃ 时间:2020-06-06 22:38:50
解答
lim ln(cosx)/x^2
=lim ln(1-2sin^(x/2))/x^2
=lim ln(1-2(x/2)^2)/x^2
=-1/2
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