Contact us
Choose a category below so we can get back to you as quickly as possible.
2分之1+4分之1+8分之1+16分之1+32分之1 =1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32 =1-1/32 =31/32
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.