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soliton923: лл²ÎÓë~~~ 2011-05-03 17:03:15
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ÒýÓûØÌû:
Originally posted by cool_smile at 2011-05-03 15:21:45:
Ô­º¯ÊýΪ   -ln(1+x)/(1+x)-1/(1+x)   
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cool_smile

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ssszhangxx

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ÒýÓûØÌû:
Originally posted by cool_smile at 2011-05-03 15:21:45:
Ô­º¯ÊýΪ   -ln(1+x)/(1+x)-1/(1+x)   
´ð°¸Îª -1/2*ln(2)+1/2

ÊÇ(1+x^2),²»ÊÇ(1+x)^2
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