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一、问题人教版数学选修4-4坐标系与参数方程第15页课后有一道习题:已知椭圆的中心为O,长轴、短轴的长分
First, the problem of people teach version of mathematics elective 4-4 coordinate system and parametric equation Page 15 after class have a problem: known oval center O, long axis, short axis long points