提问A={y/y^2-(a^2+a+1)y+a(a^2+1)>0} B={Y/Y^2-6y+8
1个回答
因为a^2+1-a=(a-1/2)^2+3/4>0
所以a^2+1>a
B:Y^2-6y+8a^2+1或y
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