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x^4+x-P/k=0, P=1N, k=1000N/m;
1,ÀûÓ÷ÑÀ­À﹫ʽµÃ½âÎö½â£º
(1)
x1 =0.500166889011701 - 0.865736728864790i
x2 =0.500166555678371 + 0.866313886681666i
x3 =-4.999999980726533e-04 - 8.660254004461054e-04i
x4 =-0.999833444692000 + 0.000288867583570i
(2)
x=9.999980016742183e-04 + 3.450266784299841e-09i
2,ÀûÓüòµ¥ÔöÁ¿·¨£º
x=0.001
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matlabËãµÄ½á¹û£¬Äã¿´¿´°É
s=solve('x^4+x-1/1000=0','x') ;vpa(s,16)

ans =

.4996665556793461+.8660255964483615*i
.4996665556793461-.8660255964483615*i
                     .9999999989998e-3
                    -1.000333111357692

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

ÎÒ²»ÊÇÁÖϪ£¬ÎÒÒ²²»½ÐÁÖϪ£¬¾ÍÕâÑù£¡
2Â¥2015-10-29 17:30:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

yuwei3601

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Ëͺ컨һ¶ä
ÒýÓûØÌû:
2Â¥: Originally posted by ÎÒÊÇÁÖϪ at 2015-10-29 17:30:33
matlabËãµÄ½á¹û£¬Äã¿´¿´°É
s=solve('x^4+x-1/1000=0','x') ;vpa(s,16)

ans =

.4996665556793461+.8660255964483615*i
.4996665556793461-.8660255964483615*i
                     .9999999989998e-3 ...

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