Contact us
Choose a category below so we can get back to you as quickly as possible.
到兩個點距離差是定值 所以是雙曲線 距離差=2a=6 a=3 焦距=2c=5-(-5) 所以c=5 b²=c²-a²=16 焦點在x軸 x²/9-y²/16=1
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.