试题与答案

求limx→1x-1x2-3x+2.

题型:解答题

题目:

lim
x→1
x-1
x2 -3x+2

答案:

lim
x→1
x-1
x2-3x+2
=
lim
x→1
x-1
(x-1)(x-2)
=
lim
x→1
1
x-2
=-1

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