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4Â¥: Originally posted by wurongjun at 2015-12-04 22:06:52
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tan(1/n)~1/n+1/n^3/3
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ln(1+1/n^2/3)~1/n^2/3
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huangbl2014

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ÒýÓûØÌû:
2Â¥: Originally posted by wurongjun at 2015-12-04 21:59:19
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tan(1/n)~1/n+1/n^3/3
n*tan(1/n)~1+1/n^2/3
ln(1+1/n^2/3)~1/n^2/3
n^2*ln(1+1/n^2/3)¡ú1/3

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wurongjun

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3Â¥: Originally posted by huangbl2014 at 2015-12-04 22:03:28
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