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2Â¥: Originally posted by math2000 at 2012-04-19 19:04:22:
dy/dlnx=(dy/dx)*(dx/dlnx)=(dy/dx)*(dlnx/dx)^(-1)=-(x/B)/(1-x/B)

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3Â¥2012-04-19 20:36:05
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math2000

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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
dy/dlnx=(dy/dx)*(dx/dlnx)=(dy/dx)*(dlnx/dx)^(-1)=-(x/B)/(1-x/B)
2Â¥2012-04-19 19:04:22
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laosam280

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5Â¥2012-04-19 21:52:11
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shumolynu

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