Find the equation of the tangent plane at (3,4,1) to the surface x^2+y^2-xyz=13. View the surface as the graph of a function of two variables z=g(x,y).
Find the equation of the tangent plane at (3,4,1) to the surface x^2+y^2-xyz=13. View the surface as the graph of a function of two variables z=g(x,y).
I did not check to see if that point is on the surface.