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limn →∞ n^2+1/2n^2+n-3=
人气:388 ℃ 时间:2020-09-10 14:53:35
解答
limn →∞ n^2+1/2n^2+n-3
=limn →∞ (1+1/n²)/[2+(1/n)-3/n²]
= (1+0)/[2+0-0]
=1/2
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