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[几何] 反演形问题

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血狼王 posted 2016-2-10 11:44 |Read mode
(1)椭圆以其中心为反演点做反演变换,那么其反演形是否可以仍为椭圆?
(2)椭圆以其焦点为反演点做反演变换,那么其反演形是否可以仍为椭圆?
(3)椭圆以其端点为反演点做反演变换,那么其反演形是否可以仍为椭圆?

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isee posted 2016-2-23 15:49
回复 1# 血狼王


    反演变换前后图形往往相差距大,第(1)问,用GeoGebra画了下,一般情况肯定不是椭圆,能不能不椭圆就要需要计算了。
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