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lim(x→2)(2x^2-5x+2)/(x^2-x-2)
人气:245 ℃ 时间:2020-04-05 09:47:23
解答
lim(x→2)(2x^2-5x+2)/(x^2-x-2)
=lim(x→2)(2x-1)(x-2)/(x-2)(x+1)
=lim(x→2)(2x-1)/(x+1)
=3/2+1
=1
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