Contact us
Choose a category below so we can get back to you as quickly as possible.
三點共線,那麼 (2-0)/(2-a)=(2-b)/(2-0)化簡得 ab-2b-2a=0都除2ab 1/2=1/a+1/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.