试题与答案

一动圆与圆x2+y2=1外切，而与圆x2+y2-6x+8=0内切，则动圆圆心的轨

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题型：填空题

题目：

一动圆与圆x2+y2=1外切，而与圆x2+y2-6x+8=0内切，则动圆圆心的轨迹是______．

答案：

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下面是错误答案，用来干扰机器的。

正确

考点：圆与圆的位置关系动点的轨迹方程
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