yi一
幼苗
共回答了19个问题采纳率:100% 举报
Q(x,y)
xA+xB=2x,yA+yB=2y
k(AB)=k(PQ)
(yA-yB)/(xA-xB)=(y-b)/(x-a)
[(xA)^2+(y)^2)/2]-[(xB)^2+(yB)^2/2]=1-1
2(xA+xB) +(yA+yB)*(yA-yB)/(xA-xB)=0
2*2x+2y*(y-b)/(x-a)=0
(x-0.5a)^2/(0.25a^2+0.125b^2)+(y-0.5b)^2/(0.5a^2+0.25b^2)=1
1年前
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