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[x*sin(3/x)]的极限,x趋于正无穷
人气:352 ℃ 时间:2020-06-20 01:32:34
解答
lim(x→∞)x*sin(3/x)
t=1/x
=lim(t→0)sin(3t)/t=lim(t→0)3sin(3t)/(3t)=3
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