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Caption=Пару параллельных прямых пересекает прямая OP,~~которая постоянно проходит через точку O на одной из них~~и движущуюся точку P на другой из этих прямых.~~Точки P' и  P'' лежат на прямой OP и находятся ~~от точки P на расстоянии n по разные стороны от точки P.~~При движении точки P вдоль прямой JP точки P' и P'' ~~описывают соответственно внутреннюю и внешнюю конхоиды.~~
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Caption=Если заменить пару параллельных прямых на пару других~~кривых, то получим конхоидальные кривые этой пары кривых.~~Построить конхоидальные кривые для разных пар кривых:~~концентрических окужностей, окружностей с общей точкой и т.п.~~Исследовать свойства полученных конхоидальных кривых~~с помощью пакета DG.
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