椭圆的准线方程是什么东西?练习上突然叫你求某椭圆的准线方程.可是教科书上提都没提过.我知道方程式是 x=正负a^2/c可这个所谓的准线在图上画出来是怎么样的?代表什么? 我对于它很陌生,
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![椭圆的准线方程是什么东西?练习上突然叫你求某椭圆的准线方程.可是教科书上提都没提过.我知道方程式是 x=正负a^2/c可这个所谓的准线在图上画出来是怎么样的?代表什么? 我对于它很陌生,](/uploads/image/z/7636669-61-9.jpg?t=%E6%A4%AD%E5%9C%86%E7%9A%84%E5%87%86%E7%BA%BF%E6%96%B9%E7%A8%8B%E6%98%AF%E4%BB%80%E4%B9%88%E4%B8%9C%E8%A5%BF%3F%E7%BB%83%E4%B9%A0%E4%B8%8A%E7%AA%81%E7%84%B6%E5%8F%AB%E4%BD%A0%E6%B1%82%E6%9F%90%E6%A4%AD%E5%9C%86%E7%9A%84%E5%87%86%E7%BA%BF%E6%96%B9%E7%A8%8B.%E5%8F%AF%E6%98%AF%E6%95%99%E7%A7%91%E4%B9%A6%E4%B8%8A%E6%8F%90%E9%83%BD%E6%B2%A1%E6%8F%90%E8%BF%87.%E6%88%91%E7%9F%A5%E9%81%93%E6%96%B9%E7%A8%8B%E5%BC%8F%E6%98%AF+x%3D%E6%AD%A3%E8%B4%9Fa%5E2%2Fc%E5%8F%AF%E8%BF%99%E4%B8%AA%E6%89%80%E8%B0%93%E7%9A%84%E5%87%86%E7%BA%BF%E5%9C%A8%E5%9B%BE%E4%B8%8A%E7%94%BB%E5%87%BA%E6%9D%A5%E6%98%AF%E6%80%8E%E4%B9%88%E6%A0%B7%E7%9A%84%3F%E4%BB%A3%E8%A1%A8%E4%BB%80%E4%B9%88%3F+%E6%88%91%E5%AF%B9%E4%BA%8E%E5%AE%83%E5%BE%88%E9%99%8C%E7%94%9F%2C)
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