lim(x趋近于2)x^2-4/x^-3x+2_数学解答

lim(x趋近于2)x^2-4/x^-3x+2

人气：117 ℃　时间：2020-05-14 07:45:23

解答

lim(x→2)(x^2-4)/(x^2-3x+2)
=lim(x→2)(x+2)(x-2)/(x-1)(x-2)
=lim(x→2)(x+2)/(x-1)
=(2+2)/(2-1)
=4
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