Question

怎么用matlab解这个方程组先是三个方程F(x,y,z)=log(((x^2+y^2+(z-5)^2)^0.5)-y)

Answer 1

我帮你试了试,可以的

function a=qiujie(p)

x=p(1);

y=p(2);

z=p(3);

a(1)=log(((x^2+y^2+(z-5)^2)^0.5)-y)-log(((x^2+y^2+(z-5)^2)^0.5)+y);

a(2)=log(((y^2+x^2+(z-5)^2)^0.5)-x)-log(((y^2+x^2+(z-5)^2)^0.5)+x);

a(3)=atan((x/y*(z-5)/(x^2+y^2+(z-5)^2)^0.5));

clc;clear;

options = optimset('Display','off','TolFun',1e-20,'MaxIter',20000,'MaxFunEvals',10000);

t=fsolve('qiujie',[1,1,1],options)

x=-0.000000000012715;

y=2.227416301455072;

z=-269012.6180821919;