作业帮limx趋于-4 x＋4/x²+2x-8求极限
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limx趋于-4 x＋4/x²+2x-8求极限
limx趋于-4 x＋4/x²+2x-8求极限
limx趋于-4 x＋4/x²+2x-8求极限
limx趋于-4 x＋4/x²+2x-8
=limx趋于-4 (x＋4)/(x+4)(x-2)
=limx趋于-4 1/(x-2)
=1/(-4-2)
=-1/6