By considering different paths of approach, show that the function below has no limit as (x,y)- (0,0). 4 X f(x,y) = 4 X . . . Examine the values of f along curves that end at (0,0). Along which set of curves is f a constant value? O A. y= kx + kx , x#0 O B. y= kX2, x #0 O c. y= kx, x#0 O D. y= kx' , x#0