Teacher Guo Pei's personal summary 1
June 1 65438+1October1,20**, I was fortunate to participate in the distance training
Our news (Wang Qi, all-media reporter of Jiujiang Radio and Television Station) Our Grade Three group has been tirelessly continuing its own onl
Conic curve formula: ellipse
1, elliptic standard equation with the center at the origin and the focus at the X axis: where x? /a£¿ +y£¿ /b£¿ = 1,