椭圆的方程一题请教!平面内两个定点的距离等于8,一个动点M到这两个定点的距离的和等于10,建立适当的坐标系,写出动点M的轨迹的方程.由题目意2c=8,2a=10得c=4,a=5,b^2=a^2-c^2=25-16=9如果焦点在x轴
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/31 21:35:45
![椭圆的方程一题请教!平面内两个定点的距离等于8,一个动点M到这两个定点的距离的和等于10,建立适当的坐标系,写出动点M的轨迹的方程.由题目意2c=8,2a=10得c=4,a=5,b^2=a^2-c^2=25-16=9如果焦点在x轴](/uploads/image/z/6091217-17-7.jpg?t=%E6%A4%AD%E5%9C%86%E7%9A%84%E6%96%B9%E7%A8%8B%E4%B8%80%E9%A2%98%E8%AF%B7%E6%95%99%21%E5%B9%B3%E9%9D%A2%E5%86%85%E4%B8%A4%E4%B8%AA%E5%AE%9A%E7%82%B9%E7%9A%84%E8%B7%9D%E7%A6%BB%E7%AD%89%E4%BA%8E8%2C%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9M%E5%88%B0%E8%BF%99%E4%B8%A4%E4%B8%AA%E5%AE%9A%E7%82%B9%E7%9A%84%E8%B7%9D%E7%A6%BB%E7%9A%84%E5%92%8C%E7%AD%89%E4%BA%8E10%2C%E5%BB%BA%E7%AB%8B%E9%80%82%E5%BD%93%E7%9A%84%E5%9D%90%E6%A0%87%E7%B3%BB%2C%E5%86%99%E5%87%BA%E5%8A%A8%E7%82%B9M%E7%9A%84%E8%BD%A8%E8%BF%B9%E7%9A%84%E6%96%B9%E7%A8%8B.%E7%94%B1%E9%A2%98%E7%9B%AE%E6%84%8F2c%3D8%2C2a%3D10%E5%BE%97c%3D4%2Ca%3D5%2Cb%5E2%3Da%5E2-c%5E2%3D25-16%3D9%E5%A6%82%E6%9E%9C%E7%84%A6%E7%82%B9%E5%9C%A8x%E8%BD%B4)
xSIo@+ͨb+T[pn%!P ,m0|_M5ROe͛V
I3i~ʌ=l&OhL/!fy5Xj
|b` "7H_7mA "39YVvsrHNr֒O}|هMhq}
i1]
j\_E1=6j8ZЫ>I?EM'i|)݆3 g9l"MkCUbp#۷nN ERs#V.!0o2$)tA;LC[=