Contact us
Choose a category below so we can get back to you as quickly as possible.
(1/x+1/y) =(1/x+1/y)*1 =(1/x+1/y)*(x+2y) =1+2y/x+x/y+2 >=2*根號下(2y/x*x/y)+3 =2根號2+3
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.