matlab解方程,x+2y+z=1 2x+y-2z=3 3x-4y+2z=9

matlab解方程,x+2y+z=1 2x+y-2z=3 3x-4y+2z=9 matlab解方程怎么出错了[x,y,z]=('x^2-5*y^2+7*z^2+12=0 ','3*x*y+x*z-11*x=0','2*y*z+40*x=0') matlab解对数方程组[x,y,z]=solve('0.29744*x/(3+0.1*x+y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)))^2','0.79*x/(3+0.1*y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.1*y+z)))^2','1.25*x/(3+0.1*z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.*1y+z)*(3+z)/ 如何用Matlab解方程组?比如2xy=1；x+2=y+z；x+y-z=4,求XYZ还有,如何画y=2X这个方程的方程图? matlab如何画z=x^2+y^2,z matlab解方程中出现is not a valid expression or equation.的错误[x,y,z]=solve('x+y+z=300','((x-y)^2+(y-z)^2+(z-x)^2)^(0.5)/(2^0.5)=50','3^0.5*(y-x)/(2z-x-y)=1') matlab 2x+y+3z=13x-y=-1y+z=5用 MATLAB软件 MATLAB软件 MATLAB软件 MATLAB软件 MATLAB软件 MATLAB软件 解方程：x+z=y (1) ,7z-(x+y)=2 (2) ,x+y+z=14 (3) Matlab 如何画如下这个方程图x^2+y^2-z^2=4 matlab怎么画方程曲面x^2+y^2+z^2=4球面怎么画 用matlab如何画马鞍面,方程：Z=x^2-y^2 如何matlab求解多元方程x,y,z,u]=solve('48.18577=x/[1+(6280000*x*z)^2]+y/[1+(6280000*y*u)^2]','655.3747=x*{6280000*x*z/[1+(6280000*x*z)^2]}+y*{6280000*y*u/[1+(6280000*y*u)^2]}','49.78774=x/[1+(5709085*x*z)^2]+y/[1+(5709085*y*u)^2]','724.7968=x* {x+y+z=4 {2y+z=0 {3x+2y-4z=-1解方程 matlab里面 请问f=@(x,y,z)(1+y)*z.^y-(-0.25*(x-1)^2+0.25)^x.; 一直出错. 解方程 x：y：z=1：2：7 2x-y+3z=21 x+2y+3z=28 x：y：z=1：2：3 解方程 解方程：根号x+根号y-1+根号z-2=1/2(x+y+z) 解一道方程,如下{x:y:z=1:2:3 x+y+z=36