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meimei2008

½ð³æ (СÓÐÃûÆø)

[½»Á÷] ¡¾ÇóÖú¡¿µü´ú·¨Çó½â¡¾Òѽâ¾ö¡¿

x^2[ln0.20015-ln0.806x]=(1-x)^2[ln0.20015-ln8.2(1-x)]
Çó½â Îó²î0.0001ÒÔÄÚ  Íò·Ö¸Ðл

[ Last edited by ²¨²»¶¯ on 2009-12-10 at 02:08 ]
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dic213

ľ³æ (ÖøÃûдÊÖ)

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meimei2008(½ð±Ò+1,VIP+0):²»»á Òª½á¹û 12-7 15:20
·ÇÏßÐÔ·½³ÌÇó¸ùµÄ¸÷ÖÖËã·¨ (1)¶þ·Ö·¨ (2)Å£¶Ù·¨ (3)ÆÕͨµü´ú·¨ (4)˹µÙ·ÒÉ­µü´ú·¨ (5)Ïҽط¨ /
´ºÃÎËæÔÆÉ¢, ·É»¨ÖðË®Á÷. ¼ÄÑÔÖÚ¶ùÅ®, ºÎ±ØÃÙÏгî.
2Â¥2009-12-07 14:17:02
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nono2009

³¬¼¶°æÖ÷ (ÎÄѧ̩¶·)

No gains, no pains.

ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐã°æÖ÷

¡ï
meimei2008(½ð±Ò+1,VIP+0):²»»á ¾ÍÏëÒª¸öÊý 12-7 15:21
jjdg(½ð±Ò+0,VIP+0):¿´À´µÃÕÒʱ¼äѧѧMATLABÁË£¡ 12-10 01:20
»áÓÃmatlabÂð£¿fsolveÖ±½Ó¸ã¶¨¡£
3Â¥2009-12-07 14:23:36
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

nono2009

³¬¼¶°æÖ÷ (ÎÄѧ̩¶·)

No gains, no pains.

ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐã°æÖ÷

Here you go. The result is highlighted in blue.

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ÓàÔó³É(½ð±Ò+3,VIP+0):ÐÁ¿à£¡ 12-7 15:48
meimei2008(½ð±Ò+6,VIP+0):·Ç³£¸Ðл ÄúÐÁ¿àÁË£¡ 12-7 16:21
>> format long;
x0=0.1;
f=@(x)x^2*(log(0.20015)-log(0.806*x))-(1-x)^2*(log(0.20015)-log(8.2*(1-x)));
x=fsolve(f,x0)

x =

   0.630637197509418

>> f(x)

ans =

    1.122976045486723e-009

[ Last edited by nono2009 on 2009-12-7 at 15:39 ]
4Â¥2009-12-07 15:37:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

¶Á

ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)

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nono2009(½ð±Ò+1,VIP+0):ллӦÖú£¡ 12-8 17:25
meimei2008(½ð±Ò+2,VIP+0):ÊÇµÄ µÃ×Ô¼º¶àÊ伸´ÎÊýÖµ ¶àл 12-9 08:22
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