Conic 指令

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Conic[ <Point>, <Point>, <Point>, <Point>, <Point> ]
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Conic[Point A, Point B, Point C, Point D, Point E]
Returns a conic section through the five given points A, B, C, D, and E.
备注: If four of the points lie on one line the conic section is not defined.
Conic[ <Number a>, <Number b>, <Number c>, <Number d>, <Number e>, <Number f> ]
Returns a conic section ax² + bxy + cy² + dx + ey + f = 0.
备注: See also Conic through Five Points tool.
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