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1/((4.5+(8.5)*(x+y-x*y)+(33/2)*(x+y-x*y)^2+(33/2)*(x+y-x*y)^3+(33/2)*(x+y-x*y)^4)*(1-(x+y-x*y))/(1-(x+y-x*y)^5)+(1-(12/(48*2^3-4)))*(1-x)+6*(12/(48*2^3-4))+(1-(12/(48*2^3-4)))*(1-x)*(12*(1-y)+1))-z=0;
         (13*(1-(1-z)^8)+9*z*(1-z)^8)*(1-x)*(1-y)=x;
         (1-(1-z)^8)/(2-(1-z)^9)=y;
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CODE:
function jie_fun
u0=[0.5 0.5 0.5];
u=fsolve(@myfun,u0)
f_val=myfun(u)



function f=myfun(u)
x=u(1);
y=u(2);
z=u(3);
f(1)=1/((4.5+(8.5)*(x+y-x*y)+(33/2)*(x+y-x*y)^2+(33/2)*(x+y-x*y)^3+(33/2)*...
    (x+y-x*y)^4)*(1-(x+y-x*y))/(1-(x+y-x*y)^5)+(1-(12/(48*2^3-4)))*(1-x)+6*...
    (12/(48*2^3-4))+(1-(12/(48*2^3-4)))*(1-x)*(12*(1-y)+1))-z;
f(2)= (13*(1-(1-z)^8)+9*z*(1-z)^8)*(1-x)*(1-y)-x;
f(3)=(1-(1-z)^8)/(2-(1-z)^9)-y;

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u =

    0.8138    0.3049    0.0733


Ä¿±êº¯ÊýÖµf_val =

  1.0e-008 *

    0.0008    0.1291   -0.0216
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CODE:
function jie_fun
clear a;clc
format long
u0=[0.5 0.5 0.5];
u=fsolve(@myfun,u0)
f_val=myfun(u)



function f=myfun(u)
x=u(1);
y=u(2);
z=u(3);
f(1)=1/((4.5+(8.5)*(x+y-x*y)+(33/2)*(x+y-x*y)^2+(33/2)*(x+y-x*y)^3+(33/2)*...
    (x+y-x*y)^4)*(1-(x+y-x*y))/(1-(x+y-x*y)^5)+(1-(12/(48*2^3-4)))*(1-x)+6*...
    (12/(48*2^3-4))+(1-(12/(48*2^3-4)))*(1-x)*(12*(1-y)+1))-z;
f(2)= (13*(1-(1-z)^8)+9*z*(1-z)^8)*(1-x)*(1-y)-x;
f(3)=(1-(1-z)^8)/(2-(1-z)^9)-y;

¼ÆËã½á¹û£º
u =

   0.813803728151198   0.304867313866725   0.073289552279229


f_val =

  1.0e-008 *

   0.000793234922192   0.129125732328816  -0.021619173118381

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3Â¥: Originally posted by ÔÂÖ»À¶ at 2014-07-14 16:14:10
ÒÔϳÌÐòµÚ¶Ô2Â¥ÖгÌÐòµÄ¸Ä½ø£¬Ìá¸ß½âµÄСÊýµãºóµÄλÊý¡£


function jie_fun
clear a;clc
format long
u0=;
u=fsolve(@myfun,u0)
f_val=myfun(u)



function f=myfun(u)
x=u(1);
y=u(2);
z=u(3);
...

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5Â¥: Originally posted by ÔÂÖ»À¶ at 2014-07-14 16:45:00
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