x+y+z=60,y+z+e=70,y+x+e=80,z+x+e=90算式如何例!
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 21:55:59
![x+y+z=60,y+z+e=70,y+x+e=80,z+x+e=90算式如何例!](/uploads/image/z/9254132-44-2.jpg?t=x%2By%2Bz%3D60%2Cy%2Bz%2Be%3D70%2Cy%2Bx%2Be%3D80%2Cz%2Bx%2Be%3D90%E7%AE%97%E5%BC%8F%E5%A6%82%E4%BD%95%E4%BE%8B%EF%BC%81)
x+y+z=60,y+z+e=70,y+x+e=80,z+x+e=90算式如何例!
x+y+z=60,y+z+e=70,y+x+e=80,z+x+e=90
算式如何例!
x+y+z=60,y+z+e=70,y+x+e=80,z+x+e=90算式如何例!
x+y+z=60 (1)
y+z+e=70 (2)
y+x+e=80 (3)
z+x+e=90 (4)
相加
3(x+y+z+e)=300
x+y+z+e=100 (5)
(5)-(1),e=40
(5)-(2),x=30
(5)-(3),z=20
(5)-(4),y=10
(x+y-z)(x-y+z)=
x+y+z=60,y+z+e=70,y+x+e=80,z+x+e=90算式如何例!
x+y+z=e∧(x+y+z),求σz/σx及σz/σy,
x+y+z=e∧(x+y+z),求σz/x及σz/y,
微积分...设z=z(x,y)是方程^2+y^2+z^2=y*e^z确定的隐函数,求dz.2x/(y*e^z-2z) dx + 2y/(y*e^z-2z) dy
X+Y+Z=?
x/y=(x+z)/(y+z)y/z=(x+y)/(x+z)
设z=f(x^2-y^2,e^(xy)),求偏导z/x,偏导z/y
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)=?
(y+z)/x=(z+x)/y=(x+y)/z求x+y-z/x+y+z的值
x+y+z=15 x+5y+10z=70 x,y,z,各是几?
x+y+z=15 x+5y+10z=70 x,y,z,各是几?
X+Y-Z=15 X+5Y+10Z=70 求:X、Y、Z
设函数z=z(x,y),由方程z=e^(2x-3z)+2y确定,求∂z/∂x,∂z/∂y
求全微分z=e^[sin(x+y)]*y^x
X+Y+Z=15 X+5Y+10Z=70,Y.Z的值
x=y; y=z; z=x/y
设z=f(x,y)由方程z+x+y=e^(z+x+y)所确定,求Dz