抛物线y=-x2上的点到直线4x+3y-8=0距离的最小值是?看我解法哪错了设直线 y=(-4/3)x+by=-x2联立 x2-(-4/3)x+b=0 △= 16/9 -4b=0 所以 b=4/9 由于设的直线和 4x+3y-8=0的直线是平行的 ..所以 直接把求得的直线的
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![抛物线y=-x2上的点到直线4x+3y-8=0距离的最小值是?看我解法哪错了设直线 y=(-4/3)x+by=-x2联立 x2-(-4/3)x+b=0 △= 16/9 -4b=0 所以 b=4/9 由于设的直线和 4x+3y-8=0的直线是平行的 ..所以 直接把求得的直线的](/uploads/image/z/11503853-53-3.jpg?t=%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-x2%E4%B8%8A%E7%9A%84%E7%82%B9%E5%88%B0%E7%9B%B4%E7%BA%BF4x%2B3y-8%3D0%E8%B7%9D%E7%A6%BB%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AF%3F%E7%9C%8B%E6%88%91%E8%A7%A3%E6%B3%95%E5%93%AA%E9%94%99%E4%BA%86%E8%AE%BE%E7%9B%B4%E7%BA%BF+y%3D%28-4%2F3%29x%2Bby%3D-x2%E8%81%94%E7%AB%8B+x2-%28-4%2F3%29x%2Bb%3D0+%E2%96%B3%3D+16%2F9+-4b%3D0+%E6%89%80%E4%BB%A5+b%3D4%2F9+%E7%94%B1%E4%BA%8E%E8%AE%BE%E7%9A%84%E7%9B%B4%E7%BA%BF%E5%92%8C+4x%2B3y-8%3D0%E7%9A%84%E7%9B%B4%E7%BA%BF%E6%98%AF%E5%B9%B3%E8%A1%8C%E7%9A%84+..%E6%89%80%E4%BB%A5+%E7%9B%B4%E6%8E%A5%E6%8A%8A%E6%B1%82%E5%BE%97%E7%9A%84%E7%9B%B4%E7%BA%BF%E7%9A%84)
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