数学牛人求救己知点p(4,-9) 和q(-2,3) 则y轴与直线段pq的交点m分直线段pq所成的比是?己知圆C: x^2+y^2-2x+4y=0 则过原点且与圆c相切的直线方程为? 麻烦过程
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![数学牛人求救己知点p(4,-9) 和q(-2,3) 则y轴与直线段pq的交点m分直线段pq所成的比是?己知圆C: x^2+y^2-2x+4y=0 则过原点且与圆c相切的直线方程为? 麻烦过程](/uploads/image/z/7632538-34-8.jpg?t=%E6%95%B0%E5%AD%A6%E7%89%9B%E4%BA%BA%E6%B1%82%E6%95%91%E5%B7%B1%E7%9F%A5%E7%82%B9p%284%2C-9%29+%E5%92%8Cq%28-2%2C3%29+%E5%88%99y%E8%BD%B4%E4%B8%8E%E7%9B%B4%E7%BA%BF%E6%AE%B5pq%E7%9A%84%E4%BA%A4%E7%82%B9m%E5%88%86%E7%9B%B4%E7%BA%BF%E6%AE%B5pq%E6%89%80%E6%88%90%E7%9A%84%E6%AF%94%E6%98%AF%3F%E5%B7%B1%E7%9F%A5%E5%9C%86C%3A+x%5E2%2By%5E2-2x%2B4y%3D0+%E5%88%99%E8%BF%87%E5%8E%9F%E7%82%B9%E4%B8%94%E4%B8%8E%E5%9C%86c%E7%9B%B8%E5%88%87%E7%9A%84%E7%9B%B4%E7%BA%BF%E6%96%B9%E7%A8%8B%E4%B8%BA%3F++%E9%BA%BB%E7%83%A6%E8%BF%87%E7%A8%8B)
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