xxyyooFF11FF22MM(-c,0)(-c,0)(c,0)(c,0)(x,y)(x,y)xxyyooFF11(0,c)(0,c)FF22(0,-c)(0,-c)M(x,M(x,y)y)22221(0)yxabab22221(0)xyabab|MF|MF11|+|MF|+|MF22|=2|=2aa|F|F11FF22|=2|=2cc找找找找bb在在哪里?哪里?图中椭圆的标准方程为图中椭圆的标准方程为请写...
时间:2024-11-20 06:01栏目:中学教育