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a+|1+a^2-2a/a-1|
人气:217 ℃ 时间:2020-05-30 08:05:04
解答
a+|(1+a^2-2a)/(a-1)|
=a+|(a-1)^2/(a-1)|
=a+|a-1|
a≥1时:
=a+a-1=2a-1
a<1时:
=a+1-a=1
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