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数学
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If the root equation (a²-1)x+5|b|-10=0 had inn,(a,b) is a pair of the real number
,then the pair of real number (a,b) is ( )
人气：396 ℃ 时间：2020-05-10 01:00:52
解答
可能是（±1,±2）,如果X 取任何值都成立的话.
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