高一圆的方程~~就一题!已知圆C1:(x-m)^2+y^2=4,C2:(x+1)^2+(y-2m)^2=9.两圆相交,求实数m的取值范围.我这样做的:求出两圆心的距离d【d是:根号(5m^2+2m+1)】,然后知道1小于d小于5,但不知怎么求m,也就是
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![高一圆的方程~~就一题!已知圆C1:(x-m)^2+y^2=4,C2:(x+1)^2+(y-2m)^2=9.两圆相交,求实数m的取值范围.我这样做的:求出两圆心的距离d【d是:根号(5m^2+2m+1)】,然后知道1小于d小于5,但不知怎么求m,也就是](/uploads/image/z/4029899-59-9.jpg?t=%E9%AB%98%E4%B8%80%E5%9C%86%E7%9A%84%E6%96%B9%E7%A8%8B%7E%7E%E5%B0%B1%E4%B8%80%E9%A2%98%21%E5%B7%B2%E7%9F%A5%E5%9C%86C1%EF%BC%9A%28x-m%29%5E2%2By%5E2%3D4%2CC2%3A%28x%2B1%29%5E2%2B%28y-2m%29%5E2%3D9.%E4%B8%A4%E5%9C%86%E7%9B%B8%E4%BA%A4%2C%E6%B1%82%E5%AE%9E%E6%95%B0m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.%E6%88%91%E8%BF%99%E6%A0%B7%E5%81%9A%E7%9A%84%EF%BC%9A%E6%B1%82%E5%87%BA%E4%B8%A4%E5%9C%86%E5%BF%83%E7%9A%84%E8%B7%9D%E7%A6%BBd%E3%80%90d%E6%98%AF%3A%E6%A0%B9%E5%8F%B7%EF%BC%885m%5E2%2B2m%2B1%29%E3%80%91%2C%E7%84%B6%E5%90%8E%E7%9F%A5%E9%81%931%E5%B0%8F%E4%BA%8Ed%E5%B0%8F%E4%BA%8E5%2C%E4%BD%86%E4%B8%8D%E7%9F%A5%E6%80%8E%E4%B9%88%E6%B1%82m%2C%E4%B9%9F%E5%B0%B1%E6%98%AF)
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