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【案例】2018年全国1卷理科12题
三位數除以一位數（二）
第八周作业
判斷球體
找出對稱軸
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折扣 例1
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
Simple Interest and Compound Interest
Compare areas by cutting shapes Q1
镂空正方体案例对比
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General Quadrilateral
Step Functions
Vectors
Special Points
Square