If y=0, ,.24 for all (x, y) er let fx.9)-y'sin(1/») ifye0. then at the point (0, 0), (a) fis not continuous (b) f is continuous but not differentiable c)exists

if y=0, ,.24 For all (x, y) eR let fx.9)-y'sin(1/») ifye0. Then at the point (0, 0), (A) fis NOT continuous (B) f is continuous but NOT differentiable C)exists butdoes NOT exist dx dy (D) fis differentiable