--------------- 现在算出两根为正负1 下面Xp怎么算.就这步.----------------已知A,B,C是长轴长为4的椭圆上的三点,点A是长轴的一个顶点,BC过椭圆中心O,如图,且·=0,|BC|=2|AC|,(1)求椭圆的方程; (2)如果椭圆
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![--------------- 现在算出两根为正负1 下面Xp怎么算.就这步.----------------已知A,B,C是长轴长为4的椭圆上的三点,点A是长轴的一个顶点,BC过椭圆中心O,如图,且·=0,|BC|=2|AC|,(1)求椭圆的方程; (2)如果椭圆](/uploads/image/z/11493775-55-5.jpg?t=---------------+%E7%8E%B0%E5%9C%A8%E7%AE%97%E5%87%BA%E4%B8%A4%E6%A0%B9%E4%B8%BA%E6%AD%A3%E8%B4%9F1+%E4%B8%8B%E9%9D%A2Xp%E6%80%8E%E4%B9%88%E7%AE%97.%E5%B0%B1%E8%BF%99%E6%AD%A5.----------------%E5%B7%B2%E7%9F%A5A%2CB%2CC%E6%98%AF%E9%95%BF%E8%BD%B4%E9%95%BF%E4%B8%BA4%E7%9A%84%E6%A4%AD%E5%9C%86%E4%B8%8A%E7%9A%84%E4%B8%89%E7%82%B9%2C%E7%82%B9A%E6%98%AF%E9%95%BF%E8%BD%B4%E7%9A%84%E4%B8%80%E4%B8%AA%E9%A1%B6%E7%82%B9%2CBC%E8%BF%87%E6%A4%AD%E5%9C%86%E4%B8%AD%E5%BF%83O%2C%E5%A6%82%E5%9B%BE%2C%E4%B8%94%C2%B7%3D0%2C%7CBC%7C%3D2%7CAC%7C%2C%281%29%E6%B1%82%E6%A4%AD%E5%9C%86%E7%9A%84%E6%96%B9%E7%A8%8B%3B+%282%29%E5%A6%82%E6%9E%9C%E6%A4%AD%E5%9C%86)
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