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lim(x->π/2)ln(3+sinx)
人气:260 ℃ 时间:2020-01-31 04:01:28
解答
lim(x->π/2)ln(3+sinx)
=lim(x->π/2)ln(3+sin(π/2))
= lim(x->π/2)ln(3+1)
= 2ln2
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