Mathematics
Senior High
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答えは、（1）−2<aのとき−2<x<a
a<−2のときa<x<−2
a=−2のとき解なし
（2）a<−1のときx<2a,a-1<x
a>-1のときx<a-1,2a<x
a=-1のときx=-2以外の全ての実数
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