lim(x^2+4x-5)/(x^2+x-2

题目详情

▼优质解答

答案和解析

lim(x→1)(x^2+4x-5)/(x^2+x-2)
=lim(x→1)(x+5)(x-1)/(x+2)(x-1)
=lim(x→1)(x+5)/(x+2)
= 6/3
=2

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