双曲线y^2/a^2-x^2/b^2=1与圆x^2+y^2-10x+20=0无公共点,则双曲线离心率的取值范围是?a>0,b>0
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![双曲线y^2/a^2-x^2/b^2=1与圆x^2+y^2-10x+20=0无公共点,则双曲线离心率的取值范围是?a>0,b>0](/uploads/image/z/9482061-21-1.jpg?t=%E5%8F%8C%E6%9B%B2%E7%BA%BFy%5E2%2Fa%5E2-x%5E2%2Fb%5E2%3D1%E4%B8%8E%E5%9C%86x%5E2%2By%5E2-10x%2B20%3D0%E6%97%A0%E5%85%AC%E5%85%B1%E7%82%B9%2C%E5%88%99%E5%8F%8C%E6%9B%B2%E7%BA%BF%E7%A6%BB%E5%BF%83%E7%8E%87%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%3Fa%3E0%2Cb%3E0)
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