如图,小圆的圆心在原点,半径为3,大圆的圆心坐标为(a,0)半径

如图,小圆的圆心在原点,半径为3,大圆的圆心坐标为(a,0)半径为5.如果两圆内含,那么的取值范围是            

 

答案

解析:略

 

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