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抛物线与手电筒(升级版)
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椭圆的聚光(升级版)
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双曲线的散光效果(升级版)
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点的轨迹为椭圆
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点的轨迹为圆4
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点的轨迹为圆3
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点的轨迹为圆2
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点的轨迹为圆1
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抛物线当中的直角弦性质
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简单的序列构造
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正态分布上课使用GGB
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一道证明题
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Angle Estimation Warmup
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right triangle paradox
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Least Squares
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AQR Section 17: Mean but Sensitive
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AQR Section 17: Where's the Mean?
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Exponential or Logistic Function that…
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Lower and Upper Sum of a Function
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