Contact us
Choose a category below so we can get back to you as quickly as possible.
lX-1l+ly-3l=0,則x=1,y=3,(y+x)/(y-x)=4/2=2,A>0,所以|A|=A,-A<0<A,B<0,|B|=-B,|A|<|B|,於是A<-B,所以-A>B,結果為B<-A<A<-B
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.