" If "z=x^(3)+y^(3)-3" axy then "(del^(2)z)/(del x del y)" is "

If f(x,y) =e^(xy) , then (del^(2)f)/(del x del y) is equal to

If u =x ^(3) +2xy^(2) -x ^(2)y show that (del^(2)u)/(delxdely) =(del^(2)u)/(delydelx).

If f(x,y) =x^(3) + y^(3) -3xy^(2) , then (del f)/(del x) at x=2, y=3 is

If u= y sin x then (del^(2)u)/(del x del y) =___________

If u (x,y) = (x ^(2))/( y)- (2y ^(2))/(x) then (del^(2) u)/(del x dely) - (del ^(2) u)/(dely delx) is :

If u=(x-y)^(2) , then (del u)/(del x) + (del u)/(del y) is

If v(x,y,z) = x^(3) + y^(3) + z^(3) + 3xyz , show that (del^(2)v)/(del y del z) = (del^(2)v)/(del z del y)

If u=log (x^(3) + y^(3) +z^(3) - 3xyz) , then (del u)/(del x) + (del u)/(del y) + (del u)/(del z)=

If u (x,y) =x ^(2) + 2xy-y ^(2) then (del u)/(del x) + (delu)/(del y) is: