F=@(x,y,z)log(x^2+y^2+z^2);g=triplequad(F,90,110,50,70,20,40

分解因式:f(x,y,z)=x^2(y-z)+y^2(z-x)+z^2(x-y) 3道高数题,1,函数F(x,y,z)=(e^x) * y * (z^2) ,其中z=z(x,y)是由x+y+z+xyz= 设函数f可微,z=f(ye^x,x/(y^2)) 求z/x,z/y 高数求梯度设函数f(x,y,z)=(x-y)2+(y-z)2+(z-x)2,求gradf(x,y,z).我算对了吗 f(x,y,z,w)=x*(x+y)*(x+y+z)*(x+y+z+w) 求解z=f(xy^2,x^2y)求δz/δx,δz/δy z=f(x^2-y^2,xy),求z关于y的偏导 1)int z=5;f ( ){ static int x=2; int y=5;x=x+2; z=z+5;y=y+z; z=yf(xy,2x+y),f有二阶连续偏导数,求аz/аx,аz/аy,аz/аxаy matlab里面 请问f=@(x,y,z)(1+y)*z.^y-(-0.25*(x-1)^2+0.25)^x.; 一直出 f(x,y,z)=0,z=g(x,y),求dy/dx,dz/dx z=z(x,y)定义在全平面上,(1)若f'x(x,y)=0,试证z=f(y); (2)若f'xy(x,y)=0,试证z