已知实数a满足1\a-|a|=2,则1\a+|a|等于多少?
1个回答
由1a-|a|=2····(1)
设1a+|a|=x
则2a=2+x即a=22+x代入(1)
得1x-2|2+x|=1
当x>-2 2+x-2x=2x+x^2 得x=-1
当x
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