Matlab计算题：求解下列非线性方程组在原点附近的根： 9x^2 + 36y^2 + 4z^2 =36 X^2 -2y^2- 20z =0 16x –

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解决时间 2021-02-05 01:38

提问者断念劫难

2021-02-04 14:04

Matlab计算题：求解下列非线性方程组在原点附近的根：

9x^2 + 36y^2 + 4z^2 =36

X^2 -2y^2- 20z =0

16x – x^3 – 2y^2 – 16z^2 = 0

注：三个方程是用大括号括起来的，我不会打大括号….

高分悬赏！答案好的加分！

求解题步骤，就是怎么在MATLAB软件中输入命令....

最佳答案

二级知识专家月亮邮递员

2021-02-04 14:36

首先建立一个m文件 我取的名字叫 syfs0000

function y=syfs0000(x)

y=[9*x(1)^2+36*x(2)^2+4*x(3)^2-36;

x(1)^2-2*x(2)^2-20*x(3);

16*x(1)-x(1)^3-2*x(2)^2-16*x(3)^2;];

end

然后在command window

输入

fsolve(‘syfs0000’，[0 0 0])

得到

ans=[0.1342 0.9972 -0.0985]

全部回答

1楼清和十五

2021-02-04 15:35

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