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Values of nCr & nPr 排列與組合的值
Author:
Alex CHIK
GeoGebra
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GeoGebra 互動數學教室
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三位數除以一位數（二）
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兩位數除以一位數（一）
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題 7
task 7
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
正n邊形與圓上點的中點軌跡(解析)
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Upper and Lower Sum or Riemann Sum
Median Value
Piecewise Functions
Circle
Rhombus