given that f(x,y) =(x^3 +y^3) ^(1/3). determine whether fy(0,0) exist?
my working:
i differentiated wrt to y, and then sub in (0,0) and i got that fy=0.
but my answer says that fy exists...
my working:
i differentiated wrt to y, and then sub in (0,0) and i got that fy=0.
but my answer says that fy exists...