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line joining centre to mid-pt. of chord ⊥ chord
Author:
Leo Chui
GeoGebra
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第八周作业3
折扣
活动三：应用性质
第八周作业2
圓的基本性質
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實數的指數律
tetrahedron rotational symmetric
人教版必修I函数表示P21例5
Question 1
交錯級數(Roger B. Nelsen)
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Sequences and Series
Functions
Angles
Derivative
Tangent Function