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畫出對稱圖形
兩組對邊相等的四邊形
兩位數除以一位數（二）
第八周作业
【案例】2013年安徽高考15题
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線對稱圖形練習1
題1
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
三垂線定理
複合圖形
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Combinatorics
Integral Calculus
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Hyperbola
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