若直线y=k(x-1)+1与圆x^2+y^2-4x-12=0的交点在第三象限,则实数k的取值范围是?怎么
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![若直线y=k(x-1)+1与圆x^2+y^2-4x-12=0的交点在第三象限,则实数k的取值范围是?怎么](/uploads/image/z/8775127-55-7.jpg?t=%E8%8B%A5%E7%9B%B4%E7%BA%BFy%3Dk%28x-1%29%2B1%E4%B8%8E%E5%9C%86x%5E2%2By%5E2-4x-12%3D0%E7%9A%84%E4%BA%A4%E7%82%B9%E5%9C%A8%E7%AC%AC%E4%B8%89%E8%B1%A1%E9%99%90%2C%E5%88%99%E5%AE%9E%E6%95%B0k%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%3F%E6%80%8E%E4%B9%88)
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