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99.5-2*x(1)-2*x(2)-x(3))^2*(26+x(1)+x(2))*(1+x(1)+2*x(2))-8.1*10^8*(7-x(1)-2*x(3))*(56-3*x(1)-4*x(2))^3=0
3-x(2)+x(3))*(56-3*x(1)-4*x(2))-27.67428*(7-x(1)-2*x(3))*(1+x(1)+2*x(2))=0
£¨3-x(2)+x(3))*(99.5-2*x(1)-2*x(2)-x(3))-11486669*(7-x(1)-2*x(3))^2=0
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snoopyzhao

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

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lxx244lxx(½ð±Ò+1):лл²ÎÓë
lxx244lxx(½ð±Ò+2):¶÷£¬Ç°ÃæÓиöÀ¨ºÅдµôÁË£¬ÇëÎÊÏÂÄã»á½âô¡£¡£¡£ 2010-05-20 11:18:20
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2Â¥2010-05-20 10:33:17
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snoopyzhao

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resonant(½ð±Ò+2):·ÑÐÄÁË£º-£© 2010-05-20 12:46:24
maxima ¸ø³öµÄ½á¹ûÊÇ£º
CODE:
(%i13) eq1:(99.5-2*x-2*y-z)^2*(26+x+y)*(1+x+2*y)-8.1*10^8*(7-x-2*z)*(56-3*x-4*y)^3=0;
eq2:(3-y+z)*(56-3*x-4*y)-27.67428*(7-x-2*z)*(1+x+2*y)=0;
eq3:(3-y+z)*(99.5-2*x-2*y-z)-11486669*(7-x-2*z)^2=0;
(%o13) (y+x+26)*(2*y+x+1)*(-z-2*y-2*x+99.5)^2
        -8.1E+8*(-4*y-3*x+56)^3*(-2*z-x+7)
         = 0
(%i14)
(%o14) (-4*y-3*x+56)*(z-y+3)-27.67428*(2*y+x+1)*(-2*z-x+7) = 0
(%i15)
(%o15) (-z-2*y-2*x+99.5)*(z-y+3)-11486669*(-2*z-x+7)^2 = 0
(%i16) solve([eq1,eq2,eq3],[x,y,z]);

rat: replaced -8.1E+8 by -810000000/1 = -8.1E+8

rat: replaced 99.5 by 199/2 = 99.5

rat: replaced -27.67428 by -27868/1007 = -27.6742800397219

rat: replaced 99.5 by 199/2 = 99.5
(%o16) [[x = 58,y = -59/2,z = (sqrt(87482476729)-2343280466)/91893354],
        [x = 58,y = -59/2,z = -(sqrt(87482476729)+2343280466)/91893354],
        [x = -65,y = 39,z = 36],[x = 166,y = -153/2,z = -159/2]]

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3Â¥2010-05-20 11:58:45
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kuangfg1987

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

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lxx244lxx(½ð±Ò+1):лл²ÎÓë
ÓÃmatlabËã°É£¬±ðÕûµÄÕâô¸´ÔÓ
4Â¥2010-05-21 21:17:39
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kuangfg1987

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

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resonant(½ð±Ò+2):¸Ðл»ØÌû½»Á÷:-) 2010-05-21 21:44:02
³ÌÐò£ºf1=0;
f2=0;
f3=0;
x0=[7 3 0];
fsolve((f1=0,f2=0,f3=0),x0)
5Â¥2010-05-21 21:21:08
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johnl

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