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2Â¥: Originally posted by lsp1005 at 2015-01-18 13:22:31
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CCTiger

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3Â¥: Originally posted by feixiaolin at 2015-01-18 15:29:24
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feixiaolin

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5Â¥: Originally posted by CCTiger at 2015-01-18 20:48:40
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exp( ln(x) )*ln(x) = [-a*x^2 - c*x - d]/b
ln(x) =ProductLog([-a*x^2 - c*x - d]/b)
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http://reference.wolfram.com/language/ref/ProductLog.html
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CCTiger

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6Â¥: Originally posted by feixiaolin at 2015-01-18 21:54:19
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Ó¦ÓÃProductLog()º¯Êý£º¶ÔÓÚ·½³Ìz=w*e^w £¬Ôò W= ProductLog(z)
ԭʽ  a*x^2+b*exp( ln(x) )*ln(x) + c*x + d =0
exp( ln(x) )*ln(x) = /b
ln(x) =ProductLog(/b)
ProductLog Óëlambert f ...

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CCTiger

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6Â¥: Originally posted by feixiaolin at 2015-01-18 21:54:19
±ä»»Ò»Ï£¬¿ÉÒԵġ£
Ó¦ÓÃProductLog()º¯Êý£º¶ÔÓÚ·½³Ìz=w*e^w £¬Ôò W= ProductLog(z)
ԭʽ  a*x^2+b*exp( ln(x) )*ln(x) + c*x + d =0
exp( ln(x) )*ln(x) = /b
ln(x) =ProductLog(/b)
ProductLog Óëlambert f ...

http://zh.wikipedia.org/wiki/%E6 ... W%E5%87%BD%E6%95%B0£¬ÕâÀïºÜ¶àÀý×Ó£¬Ö»ÊÇÎÒ²»»á±ä»»£¬»òÕß˵²»ÄÜÄܱ任³Éz=w*e^wµÄÐÎʽ¡£
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feixiaolin

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8Â¥: Originally posted by CCTiger at 2015-01-19 12:44:45
http://zh.wikipedia.org/wiki/%E6%9C%97%E4%BC%AFW%E5%87%BD%E6%95%B0£¬ÕâÀïºÜ¶àÀý×Ó£¬Ö»ÊÇÎÒ²»»á±ä»»£¬»òÕß˵²»ÄÜÄܱ任³Éz=w*e^wµÄÐÎʽ¡£...

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