z=828x 2828y88.28=828^888.28大概估计下

z=828x 2828y88.28=828^888.28大概估计下 matlab中Index exceeds matrix dimensions.错误function [x,m]=g1(x)syms z k m x hz(1)=30;z(2)=68;z(3)=75;z(4)=82;z(5)=82;z(6)=77;z(7)=68;z(8)=68;z(9)=58;z(10)=51;z(11)=50;z(12)=41;z(13)=38;z(14)=35;z(15)=28;z(16)=25;z(17)=18;z(18)=15;z(19)=12;z(20)=1 (x+y-z)(x-y+z)= z=x X+Y+Z=? x/y=(x+z)/(y+z)y/z=(x+y)/(x+z) 已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=? z=x^(y/z) 偏导数 (y+z)/x=(z+x)/y=(x+y)/z求x+y-z/x+y+z的值 fangchengzu:X+Z=Y 7Z=X+Y+Z X+Y+Z=14 z+=x>y?++x: 解方程 x+y+z=0 4x+2y+z=3 9x-3y+z=28解方程x+y+z=04x+2y+z=39x-3y+z=28 x*(y-Z)=27,y*(x-Z)=35,Z*(x+y)=28三个方程正整数解 x+y+z=28 x+y=16 y+z=14,求x、y、z分别是什么数? x+x+z+z+z=29,x+z=14,问x=几,z=几 2x+3y+z=13 4x^2+9y^2+z^2-2x+15y+3z=82 求x,y,z (x-2y+z)(x+y-2z)分之（y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y) + (y+z-2z)(x-2y+z)分之（x-z)(y-z)=?第三部分那个是 （y+z-2x)(x-2y+z)分之（x-z)(y-z) 用行列式的性质证明：y+z z+x x+y x y z x+y y+z z+x =2 z x y z+x x+y y+z y z x 这个怎么证?