已知抛物线E:x^=2px(p>0)的准线方程是Y=-1/2求:过点F(0,1/2)的直线L与抛物线E交于P,Q两点,设N(0,a)(a
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![已知抛物线E:x^=2px(p>0)的准线方程是Y=-1/2求:过点F(0,1/2)的直线L与抛物线E交于P,Q两点,设N(0,a)(a](/uploads/image/z/8663934-30-4.jpg?t=%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFE%EF%BC%9Ax%5E%3D2px%28p%3E0%29%E7%9A%84%E5%87%86%E7%BA%BF%E6%96%B9%E7%A8%8B%E6%98%AFY%3D-1%2F2%E6%B1%82%EF%BC%9A%E8%BF%87%E7%82%B9F%EF%BC%880%2C1%2F2%EF%BC%89%E7%9A%84%E7%9B%B4%E7%BA%BFL%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BFE%E4%BA%A4%E4%BA%8EP%2CQ%E4%B8%A4%E7%82%B9%2C%E8%AE%BEN%EF%BC%880%2Ca%29%28a)
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