簡(jiǎn)單絕對(duì)值不等式?

科技 未結(jié) 5 1250
7023125
7023125 2021-11-20 13:37
簡(jiǎn)單絕對(duì)值不等式?
5條回答
  •  wsj3014
    wsj3014 (樓主)
    2021-11-20 13:50

    分類討論當(dāng)x>,得(x+2)-(2x-1)<x-1,得x>2,當(dāng)x<-2,得-(x+2)+(2x-1)<x-1,恒成立,即x<-2,當(dāng)-2≤x≤,得(x+2)+(2x-1)<x-1,x<-1,即-2≤x<-1,綜上得x>2,或x<-1,

提交回復(fù)