(Solved): need help bad 8. For f(x,y)={x4+y2x2y,(x,y)=(0,0),isfdifferentiableat(0,0)?Dofx ...
need help bad
8. For f(x,y)={x4+y2x2y?,(x,y)?=(0,0), is f differentiable at (0,0)? Do fx?,fy? exists and 0,(x,y)=(0,0? are they continuous at (0,0) ? Do they exists and continuous at (x,y)?=(0,0) ? Is f differentiable at (x,y)?=(0,0)?