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Unter- und Obersumme
Author:
迎锋 徐
GeoGebra
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Earth with coastline
幾何作圖題：切三圓（題目）
美國國旗 (Codex, 2026.10.06)
美國國旗 (Claude 版)
三半圓間的相切圓(Codex╱2026.10.07)
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Task4
賺賠：例3的副本
二次函数的探究
Solving the equations in the form ax + b = cx + d (Grouping like terms)
江苏高考物理最后一题模拟
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Conditional Probability
Upper and Lower Sum or Riemann Sum
Constructions
Geometric Mean
Hyperbola