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lim趋于无穷 x^2-1/2x^2-x-1.
人气:172 ℃ 时间:2020-06-24 06:00:40
解答
lim趋于无穷 x^2-1/2x^2-x-1
=lim趋于无穷 (x+1)(x-1)/(x-1)(2x+1)
==lim趋于无穷 (x+1)/(2x+1)
=1/2
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