/X+1/+/X+2/

题目

/X+1/+/X+2/

答案

/X+1/+/X+2/当x>=-1时,x+1+x+2x²-2x-2>0
x>1+√3或x<1-√3,
综合得：-1<=x<1-√3
当-2<=x<-1时,1-x+x+2x²-2>0
x>√2或x<-√2,
综合得：-2<=x<-√2,
当x<-2时,1-x+2-xx²+2x-2>0
x>-1+√3或x<-1-√3
综合得：x<-1-√3
综上所述,原不等式的解为：
-1<=x<1-√3或-2<=x<-√2或x<-1-√3