x∈R,下列不等式中解法正确的是
Ax^2>2=>x>±√2B(x-1^2)<2=>1-√2<x<1+√2Cax+b<0=>x<-b/aD√(x^2-1)<1-2x=>x^2-1<(1-2x)^2=>3x...
A x^2>2 => x>±√2
B (x-1^2)<2 => 1-√2<x<1+√2
C ax+b<0 => x<-b/a
D √(x^2-1)<1-2x => x^2-1<(1-2x)^2 =>3x^2-4x+2>0 ∵△=16-24<0 ∴无解
给出解释 谢谢 展开
B (x-1^2)<2 => 1-√2<x<1+√2
C ax+b<0 => x<-b/a
D √(x^2-1)<1-2x => x^2-1<(1-2x)^2 =>3x^2-4x+2>0 ∵△=16-24<0 ∴无解
给出解释 谢谢 展开
2个回答
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询