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limx→0 x^2/x-1怎么解
人气:103 ℃ 时间:2020-09-28 21:45:47
解答
limx→0 x^2/(x-1)=limx→0 [(x^2-1)+1]/(x-1)
=limx→0 [(x-1)(x+1)+1]/(x-1)
=limx→0 (x+2)
=2
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