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Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
5Â¥: Originally posted by Edstrayer at 2015-11-14 00:30:00
0.8x+16.67x^{0.59414}-32=0
x\approx 2.66819934889619\cdots
0.8x+16.67x^{0.59414}-48=0
x\approx 5.10566008193624\cdots
0.8x+16.67x^{0.59414}-64=0
x\approx 8.05041012154994\cdots...

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11Â¥2015-11-14 09:07:26
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Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
6Â¥: Originally posted by shabaolin at 2015-11-14 06:27:52
ÊýÖµÇó½â

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12Â¥2015-11-14 09:08:05
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Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
8Â¥: Originally posted by peterflyer at 2015-11-14 07:37:26
½«·½³Ì¿´×÷f(x)=0£¬f'(x)=0µÄʵ¸ù½â³öÖ»ÓÐÒ»¸ö£¬¶øf"(x)>=0¡£¹Êf(x)Ö»ÓÐÒ»¸öפµã£¬Òò´Ëf(x)Êǵ¥µ÷ÉÏÉýµÄ¡£¶øf(0)<0£¬xÇ÷ÓÚÎÞÇîʱfÒ²Ç÷ÓÚÎÞÇ˵Ã÷f(x)=0Ö»ÓÐÒ»¸ö¸ù¡£Î»ÓÚ0ºÍÎÞÇîÖ®¼ä¡£
...

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13Â¥2015-11-14 09:09:10
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Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
10Â¥: Originally posted by ×îÁ¯ÏüÎè at 2015-11-14 08:18:17
ÓÃmatlabÒ»Ëã¾ÍºÃÁË£¬»¹ÊÇÄãÒª¹ý³Ì£¿Ò²¿ÉÒÔ½âµÄ

ÎÒÖ»ÏëÒª¸ö½á¹û£¬Èç¹ûÄܸæËßÎÒÓÃʲôÈí¼þ¼ÆËã³öÀ´µÄÄǾ͸üºÃÁË£¡
14Â¥2015-11-14 09:10:11
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wurongjun

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

>> x1=fzero('0.8*x+16.67*x^0.59414-32',2);
>> x2=fzero('0.8*x+16.67*x^0.59414-48',4);
>> x3=fzero('0.8*x+16.67*x^0.59414-64',6);
>> [vpa(x1,20);vpa(x2,20);vpa(x3,20)]

ans =

[ 2.6681993488961874839]
[ 5.1056600819362412125]
[ 8.0504101215499410671]
ÉÆ¶ñµ½Í·ÖÕÓб¨,È˼äÕýµÀÊDz×É£.
15Â¥2015-11-14 10:43:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

×îÁ¯ÏüÎè

ľ³æ (ÕýʽдÊÖ)

ÄǸöÈí¼þ¾Í½Ðmatlab¾ØÕóʵÑéÊÒ£¬¼ÆËãÊýѧÎÊÌâÌØ±ð¿ì½Ý

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16Â¥2015-11-14 11:19:21
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Edstrayer

°æÖ÷ (ÖøÃûдÊÖ)

·½´ç¶·ÊÒСÌìµØÕýÆøÃÔÂþ´óÊÀ½ç

ÒýÓûØÌû:
11Â¥: Originally posted by Ó±¶ùbelieve at 2015-11-14 09:07:26
·Ç³£¸Ðл£¬µ«ÊÇÄúµÄ»ØÌû²»ÊÇÓ¦Öú»ØÌû£¬½ð±Òû·¨¸øÄ㣬Äã¿ÉÒԻظ´Ò»¸öÓ¦Öú»ØÌû£¬ÎҰѽð±Ò²¹ÉÏ¡£ ÁíÍâÏëÎÊÄãÊÇÓÃʲôÈí¼þ½â³öÀ´µÄ£¿ÄÑÂð£¿...

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Çà´ÐËêÔÂÊ¥µ®Ò¹£¬ÀËÂþ¸èÎèÓ­ÐÂÄê¡£
17Â¥2015-11-14 17:41:48
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
15Â¥: Originally posted by wurongjun at 2015-11-14 10:43:33
>> x1=fzero('0.8*x+16.67*x^0.59414-32',2);
>> x2=fzero('0.8*x+16.67*x^0.59414-48',4);
>> x3=fzero('0.8*x+16.67*x^0.59414-64',6);
>>

ans =



...

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18Â¥2015-11-15 15:29:44
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
16Â¥: Originally posted by ×îÁ¯ÏüÎè at 2015-11-14 11:19:21
ÄǸöÈí¼þ¾Í½Ðmatlab¾ØÕóʵÑéÊÒ£¬¼ÆËãÊýѧÎÊÌâÌØ±ð¿ì½Ý

лÀ²£¬ÎÒÏÂÔØÒ»¸öÊÔÊÔ¡£
19Â¥2015-11-15 15:30:02
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Ó±¶ùbelieve

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
17Â¥: Originally posted by Edstrayer at 2015-11-14 17:41:48
Ŷ£¬ÊÇÓÃmathematicsÈí¼þ¼ÆËãµÄ£¬²»À§ÄÑ£¬ÕâÖÖ·½³ÌÖ»Êǵ÷ÓÃÒ»Ìõ¼ÆËãÃüÁî¶øÒÑ£¬¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­...

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