已知抛物线y²=4x及点P(2,2),直线l斜率为1且不过点P,与抛物线交于A,B两点求:若AP、BP分别与抛物线交于另一点C、D,证明:AD、BC交于定点.
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![已知抛物线y²=4x及点P(2,2),直线l斜率为1且不过点P,与抛物线交于A,B两点求:若AP、BP分别与抛物线交于另一点C、D,证明:AD、BC交于定点.](/uploads/image/z/12872362-58-2.jpg?t=%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%26sup2%3B%3D4x%E5%8F%8A%E7%82%B9P%282%2C2%29%2C%E7%9B%B4%E7%BA%BFl%E6%96%9C%E7%8E%87%E4%B8%BA1%E4%B8%94%E4%B8%8D%E8%BF%87%E7%82%B9P%2C%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%BA%A4%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%E6%B1%82%EF%BC%9A%E8%8B%A5AP%E3%80%81BP%E5%88%86%E5%88%AB%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%BA%A4%E4%BA%8E%E5%8F%A6%E4%B8%80%E7%82%B9C%E3%80%81D%2C%E8%AF%81%E6%98%8E%EF%BC%9AAD%E3%80%81BC%E4%BA%A4%E4%BA%8E%E5%AE%9A%E7%82%B9.)
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