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wurongjun

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zhang1226

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3Â¥: Originally posted by wurongjun at 2015-08-08 17:37:31
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4Â¥2015-08-08 17:44:50
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zhang1226

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ÒýÓûØÌû:
5Â¥: Originally posted by wurongjun at 2015-08-08 18:33:49
y=(r,r')
y'=?(Õâ¸öÄã×Ô¼ºÍưÉ)
y'(0)=(r'(0),r''(0))
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