如图,过抛物线x^2=4y焦点的直线依次交抛物线与圆x^2+(y-1)^2=1于点A,B,C,D,则向量AB乘向量CD的值是?不好上传图,你们应该能知道是什么图,一个抛物线开口向上,以(0,1)为圆心,半径为1画圆,直线是左
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![如图,过抛物线x^2=4y焦点的直线依次交抛物线与圆x^2+(y-1)^2=1于点A,B,C,D,则向量AB乘向量CD的值是?不好上传图,你们应该能知道是什么图,一个抛物线开口向上,以(0,1)为圆心,半径为1画圆,直线是左](/uploads/image/z/2763621-45-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E8%BF%87%E6%8A%9B%E7%89%A9%E7%BA%BFx%5E2%3D4y%E7%84%A6%E7%82%B9%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BE%9D%E6%AC%A1%E4%BA%A4%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8E%E5%9C%86x%5E2%2B%28y-1%29%5E2%3D1%E4%BA%8E%E7%82%B9A%2CB%2CC%2CD%2C%E5%88%99%E5%90%91%E9%87%8FAB%E4%B9%98%E5%90%91%E9%87%8FCD%E7%9A%84%E5%80%BC%E6%98%AF%3F%E4%B8%8D%E5%A5%BD%E4%B8%8A%E4%BC%A0%E5%9B%BE%2C%E4%BD%A0%E4%BB%AC%E5%BA%94%E8%AF%A5%E8%83%BD%E7%9F%A5%E9%81%93%E6%98%AF%E4%BB%80%E4%B9%88%E5%9B%BE%2C%E4%B8%80%E4%B8%AA%E6%8A%9B%E7%89%A9%E7%BA%BF%E5%BC%80%E5%8F%A3%E5%90%91%E4%B8%8A%2C%E4%BB%A5%280%2C1%29%E4%B8%BA%E5%9C%86%E5%BF%83%2C%E5%8D%8A%E5%BE%84%E4%B8%BA1%E7%94%BB%E5%9C%86%2C%E7%9B%B4%E7%BA%BF%E6%98%AF%E5%B7%A6)
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