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動態角=30
Author:
曾強
若ABCD為邊長為2根號3的正方形,P為AB中點,DQ為1,若Q為邊長上的動點,試問有幾個O可以讓角POQ為30度
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兩位數加法
錐體建築師
兩位數除以一位數(二)
三位數除以一位數(一)
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怪函數之3
正弦與餘弦值的大小關係
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y=-3x+6(x>=3)
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Upper and Lower Sum or Riemann Sum
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