2sin(2+2y-3z)=x+2y-3z,证明δz/δx+δz/δy=1

问题描述:

2sin(2+2y-3z)=x+2y-3z,证明δz/δx+δz/δy=1

已知2sin(x+2y-3z)=x+2y-3z,求证∂z/∂x+∂z/∂y=1【原题有错!2sin(2+2y-3z)应是2sin(x+2y-3z)之误,否则等式不能成立.】证明:令F(x,y,z)=2sin(x+2y-3z)-x-2y+3z=0则∂z/∂x=-(∂...