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·½³ÌÈçÏ£º y=solve('y^3-5*k/m*y^2+6*k^2/m^2*y-k^3/m^3') µÃµ½µÄ´ð°¸Îª£º y = [ (1/6*(28+84*i*3^(1/2))^(1/3)+14/3/(28+84*i*3^(1/2))^(1/3)+5/3)*k/m] [ (-1/12*(28+84*i*3^(1/2))^(1/3)-7/3/(28+84*i*3^(1/2))^(1/3)+5/3+1/2*i*3^(1/2)*(1/6*(28+84*i*3^(1/2))^(1/3)-14/3/(28+84*i*3^(1/2))^(1/3)))*k/m] [ (-1/12*(28+84*i*3^(1/2))^(1/3)-7/3/(28+84*i*3^(1/2))^(1/3)+5/3-1/2*i*3^(1/2)*(1/6*(28+84*i*3^(1/2))^(1/3)-14/3/(28+84*i*3^(1/2))^(1/3)))*k/m] >> Õâ¸öÊÇÊéÉϵķ½³Ì£¬ÊéÉϸø³öµÄ½âûÓи´Êýi£¬²»ÖªµÀΪʲôÓÃmatlab6Çó½âºóµÃµ½Á˸´ÊýiÁËÄØ£¿£¿ÕæÐÄÇó°ï×飬ÎҵıҲ»¶à ¼ûÁ |
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dbb627
ÈÙÓþ°æÖ÷ (ÖøÃûдÊÖ)
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ר¼Ò¾Ñé: +4 - ¼ÆËãÇ¿Ìû: 12
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¡¾´ð°¸¡¿Ó¦Öú»ØÌû
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y=solve('y^3-5*k/m*y^2+6*k^2/m^2*y-k^3/m^3','y') y = ((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3) + (5*k)/(3*m) + (7*k^2)/(9*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)) (5*k)/(3*m) - ((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)/2 - (7*k^2)/(18*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)) - (3^(1/2)*(((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3) - (7*k^2)/(9*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)))*i)/2 (5*k)/(3*m) - ((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)/2 - (7*k^2)/(18*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)) + (3^(1/2)*(((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3) - (7*k^2)/(9*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)))*i)/2 |

2Â¥2012-07-19 21:34:56
dbb627
ÈÙÓþ°æÖ÷ (ÖøÃûдÊÖ)
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ר¼Ò¾Ñé: +4 - ¼ÆËãÇ¿Ìû: 12
- Ó¦Öú: 289 (´óѧÉú)
- ¹ó±ö: 0.589
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- É¢½ð: 551
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- Ìû×Ó: 1246
- ÔÚÏß: 1794.8Сʱ
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- ×¢²á: 2005-12-29
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- רҵ: ÎÛȾ¿ØÖÆ»¯Ñ§
- ¹ÜϽ: ¼ÆËãÄ£Äâ

3Â¥2012-07-19 21:37:00
qjf880726
¾èÖú¹ó±ö (ÕýʽдÊÖ)
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|
ºÇºÇ лл ÎÒµÄÎÊÌâ½â¾öÁË ÔÀ´ÎÒ°ÑÎÒÐİ®µÄmatlab6.5»»³ÉÂÛ̳ÀïÌṩÏÂÔØµÄmatlab2012ºóÔÙÊäÈë¾ÍÕý³£ÁË ºÜÉñÆæ ÎÒÊǸ÷ÖÖÎÞÓï¡£¡£¡£ >> y=solve('y^3-5*k/m*y^2+6*k^2/m^2*y-k^3/m^3') y = ((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3) + (5*k)/(3*m) + (7*k^2)/(9*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)) (5*k)/(3*m) + (3^(1/2)*(((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3) - (7*k^2)/(9*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)))*i)/2 - ((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)/2 - (7*k^2)/(18*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)) (5*k)/(3*m) - (3^(1/2)*(((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3) - (7*k^2)/(9*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)))*i)/2 - ((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)/2 - (7*k^2)/(18*m^2*((-(49*k^6)/(108*m^6))^(1/2) + (7*k^3)/(54*m^3))^(1/3)) >> |

4Â¥2012-07-19 22:29:55
°²»ÕÁù°²»úÆ÷
½ð³æ (ÕýʽдÊÖ)
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5Â¥2012-08-10 21:58:07









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