Contact us
Choose a category below so we can get back to you as quickly as possible.
是以(4.0)、(-4.0)為焦點的橢圓方程,a為兩焦點到圓上距離和的1/2=6 c=焦點到原點的距離=4,橢圓方程x^2/a^2+y^2/b^2=1.b^2=a^2-c^2代入得x^2/36+y^2/20=1_我打字慢,給點分吧!
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.