韦达定理在圆锥曲线上的应用.很难很难的- -!敢不敢进- -!求出p不就完了吗?为什么要把p代回去检查是否有实数根?有根说明了什么?没有根又怎样?这道题本来就是直线割抛物线的,有可能没根么
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![韦达定理在圆锥曲线上的应用.很难很难的- -!敢不敢进- -!求出p不就完了吗?为什么要把p代回去检查是否有实数根?有根说明了什么?没有根又怎样?这道题本来就是直线割抛物线的,有可能没根么](/uploads/image/z/7248226-58-6.jpg?t=%E9%9F%A6%E8%BE%BE%E5%AE%9A%E7%90%86%E5%9C%A8%E5%9C%86%E9%94%A5%E6%9B%B2%E7%BA%BF%E4%B8%8A%E7%9A%84%E5%BA%94%E7%94%A8.%E5%BE%88%E9%9A%BE%E5%BE%88%E9%9A%BE%E7%9A%84-+-%21%E6%95%A2%E4%B8%8D%E6%95%A2%E8%BF%9B-+-%21%E6%B1%82%E5%87%BAp%E4%B8%8D%E5%B0%B1%E5%AE%8C%E4%BA%86%E5%90%97%3F%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E6%8A%8Ap%E4%BB%A3%E5%9B%9E%E5%8E%BB%E6%A3%80%E6%9F%A5%E6%98%AF%E5%90%A6%E6%9C%89%E5%AE%9E%E6%95%B0%E6%A0%B9%3F%E6%9C%89%E6%A0%B9%E8%AF%B4%E6%98%8E%E4%BA%86%E4%BB%80%E4%B9%88%3F%E6%B2%A1%E6%9C%89%E6%A0%B9%E5%8F%88%E6%80%8E%E6%A0%B7%3F%E8%BF%99%E9%81%93%E9%A2%98%E6%9C%AC%E6%9D%A5%E5%B0%B1%E6%98%AF%E7%9B%B4%E7%BA%BF%E5%89%B2%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%2C%E6%9C%89%E5%8F%AF%E8%83%BD%E6%B2%A1%E6%A0%B9%E4%B9%88)
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