高校问答
100层电梯23关:Maths Queation
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高校问答
时间:2024/07/11 23:15:48
已知k>-2,试化简
绝对值2k+1绝对值+绝对值2-k绝对值
-2<k<-1/2
=-2K-2+2-K=-3K
K>=-1/2
=2K+1+2-K=K+3
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