Category: 21级数学研究生第一次授课
20211009-全等三角形-212021096
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20211009-正弦定理-212021097
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20211009-等差数列的通项公式-212021102
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20211010-线段垂直平分线的性质-212021116
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http://m.youku.com/v_show/id_XNTgxMjE1NTczNg==.html
210917-基本不等式-212040016
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211008-三角函数诱导公式-212040011
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211008-勾股定理-212021083
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211008—集合的概念—212021082
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