5.若有理数m,n满足/2m+1/+(n+2)的平方=0,则mn等于() A.-1 B.-2 C5.若有理数m,n满足/2m+1/+(n+2)的平方=0,则mn等于() A.-1 B.-2 C.2 D.1
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题目内容:
5.若有理数m,n满足/2m+1/+(n+2)的平方=0,则mn等于() A.-1 B.-2 C
5.若有理数m,n满足/2m+1/+(n+2)的平方=0,则mn等于() A.-1 B.-2 C.2 D.1
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