已知圆(x-1)^2+y^2=2 若直线y=x+b与圆有两个交点,则b的取值范围是()我觉得是先把直线化成一般式 就是x-y+b=0 由圆的方程可知道 圆的圆心坐标是 (1,0),然后用点到直线举例公式就是|Ax+By+C|
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![已知圆(x-1)^2+y^2=2 若直线y=x+b与圆有两个交点,则b的取值范围是()我觉得是先把直线化成一般式 就是x-y+b=0 由圆的方程可知道 圆的圆心坐标是 (1,0),然后用点到直线举例公式就是|Ax+By+C|](/uploads/image/z/6816707-35-7.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9C%86%EF%BC%88x-1%EF%BC%89%5E2%2By%5E2%3D2+%E8%8B%A5%E7%9B%B4%E7%BA%BFy%3Dx%2Bb%E4%B8%8E%E5%9C%86%E6%9C%89%E4%B8%A4%E4%B8%AA%E4%BA%A4%E7%82%B9%2C%E5%88%99b%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%EF%BC%88%EF%BC%89%E6%88%91%E8%A7%89%E5%BE%97%E6%98%AF%E5%85%88%E6%8A%8A%E7%9B%B4%E7%BA%BF%E5%8C%96%E6%88%90%E4%B8%80%E8%88%AC%E5%BC%8F+%E5%B0%B1%E6%98%AFx-y%2Bb%3D0+%E7%94%B1%E5%9C%86%E7%9A%84%E6%96%B9%E7%A8%8B%E5%8F%AF%E7%9F%A5%E9%81%93+%E5%9C%86%E7%9A%84%E5%9C%86%E5%BF%83%E5%9D%90%E6%A0%87%E6%98%AF+%EF%BC%881%2C0%EF%BC%89%2C%E7%84%B6%E5%90%8E%E7%94%A8%E7%82%B9%E5%88%B0%E7%9B%B4%E7%BA%BF%E4%B8%BE%E4%BE%8B%E5%85%AC%E5%BC%8F%E5%B0%B1%E6%98%AF%7CAx%2BBy%2BC%7C)
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