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圆的展开与计算

Author:九章算术

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球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
直線的斜率
漂亮的摇摆曲线
圓的切線方程

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动圆在定圆上滚动
橢圓3--平行四邊形法
橢圓代數性質,光學性質,生活應用
任意三棱锥的外接球
長方體的體積

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Real Numbers
Geometry
Quadratic Equations
Sequences and Series
Numbers

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