问题
选择题
|
答案
（lim x→1
-1 x2-3x+2
）2 x2-4x+3
=
[lim x→1
-1 (x-2)(x-1)
]2 (x-1)(x-3)
=lim x→1 1-x (x-1)(x-2)(x-3)
=lim x→1 -1 (x-2)(x-3)
=-
．1 2
故选A．
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|
（lim x→1
-1 x2-3x+2
）2 x2-4x+3
=
[lim x→1
-1 (x-2)(x-1)
]2 (x-1)(x-3)
=lim x→1 1-x (x-1)(x-2)(x-3)
=lim x→1 -1 (x-2)(x-3)
=-
．1 2
故选A．