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西华大学应用数学系朱雯
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西华大学应用数学系朱雯
Website URL:
http://kczx.xhu.edu.cn/G2S/eWebEditor/uploadfile/20161128150107405.pdf
Category:
Condensing/Separating Machine
问题 ³cos 2 xdx sin 2x C, 解决方法 利用复合函数，设置中间变量. 过程 令 t 2x, 2 1 dx dt ³cos tdt 2 1 sint C 2 1 2 . 2 1 x 一、第一类换元法
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