Contact us
Choose a category below so we can get back to you as quickly as possible.
貌似題目應該是X^2+Y^2-2X-4Y+M=0吧~ 那樣的話可化為(X-1)^2+(Y-2)^2=5-M 如果是圓,則半徑5-M>0,所以M
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.