已知点A在抛物线y^2=4x上,过点A作圆C:(x-1)^2+y^2=1的直线AP,AQ交y轴于M,N.P,Q是切点.1.若A(4,4)求PQ直线方程2.若向量AM乘向量AN=-2,求点A坐标
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![已知点A在抛物线y^2=4x上,过点A作圆C:(x-1)^2+y^2=1的直线AP,AQ交y轴于M,N.P,Q是切点.1.若A(4,4)求PQ直线方程2.若向量AM乘向量AN=-2,求点A坐标](/uploads/image/z/12781823-23-3.jpg?t=%E5%B7%B2%E7%9F%A5%E7%82%B9A%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BFy%5E2%3D4x%E4%B8%8A%2C%E8%BF%87%E7%82%B9A%E4%BD%9C%E5%9C%86C%3A%28x-1%29%5E2%2By%5E2%3D1%E7%9A%84%E7%9B%B4%E7%BA%BFAP%2CAQ%E4%BA%A4y%E8%BD%B4%E4%BA%8EM%2CN.P%2CQ%E6%98%AF%E5%88%87%E7%82%B9.1.%E8%8B%A5A%EF%BC%884%2C4%EF%BC%89%E6%B1%82PQ%E7%9B%B4%E7%BA%BF%E6%96%B9%E7%A8%8B2.%E8%8B%A5%E5%90%91%E9%87%8FAM%E4%B9%98%E5%90%91%E9%87%8FAN%3D-2%2C%E6%B1%82%E7%82%B9A%E5%9D%90%E6%A0%87)
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