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creepon

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×öʵÑéºó£¬µÃµ½ÕâÑùÒ»¸ö·½³Ì£º y = lnx + x
ÏëÖªµÀ·´º¯Êý£¬¾ÍÊÇ X = f£¨y£©£¬Õâ¸öf£¨y£©·½³ÌÊǶàÉÙ£¿¿ÒÇëÊýѧţÈ˰ïÎÒ½â¾öÏÂ
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wangefang

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Ç°ÃæÓиöÌû×ÓÇóº¯ÊýµÄ·´º¯Êý, µ«ÊǺÃÏñûÓÐÈËÓ¦Öú³É¹¦.

ÄãµÄÕâ¸öÎÊÌâÀàËÆ, Ò×Öª·´º¯Êý´æÔÚ, µ«ÊÇÏÔʽ±í´ïÊ½ÄØ? ²»ºÃ˵Óа¡!
Themorewedo,themorewecando.
2Â¥2013-06-18 22:50:13
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Medichen

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3Â¥2013-06-18 23:50:35
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creepon

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by Medichen at 2013-06-18 23:50:35
½âÎö½â¿ÉÄÜÇó²»³öÀ´£¬µ«¿ÉÒÔÇóÊýÖµ½âÂï

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4Â¥2013-06-19 11:27:51
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wangefang

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
4Â¥: Originally posted by creepon at 2013-06-19 11:27:51
¼ÙÉèy=3£¬ÄÇx=¶àÉÙ£¿Ôõô½â...

Õâ¸öÈÝÒ×, ʹÓÃmaple¼ÆËã.
ÊäÈë solve(ln(x)+x=3,x);
Êä³ö                        LambertW(exp(3))
ÕâÀï LambertW()ÊÇÀʲ®Wº¯Êý.  
´ÓÕâ¸ö½Ç¶È¿´, º¯Êýy=lnx+xµÄ·´º¯Êý¶à°ëÊDz»ÄÜÓóõµÈº¯Êý±íʾ³öÀ´µÄ.
°ÑÕâ¸öº¯ÊýÖµ¶ÔÓ¦¸¡µãÊýÇó³öÀ´
ÊäÈë evalf(%);
Êä³ö                       2.207940032
Themorewedo,themorewecando.
5Â¥2013-06-19 12:13:10
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

creepon

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
5Â¥: Originally posted by wangefang at 2013-06-19 12:13:10
Õâ¸öÈÝÒ×, ʹÓÃmaple¼ÆËã.
ÊäÈë solve(ln(x)+x=3,x);
Êä³ö                        LambertW(exp(3))
ÕâÀï LambertW()ÊÇÀʲ®Wº¯Êý.  
´ÓÕâ¸ö½Ç¶È¿´, º¯Êýy=lnx+xµÄ·´º¯Êý¶à°ëÊDz»ÄÜÓóõµÈº¯Êý±íʾ³öÀ´µÄ.
°ÑÕâ ...

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