F()= ty3 y2 ca)oss o the tunchoo is ddfeaeniable at (oo)

f(x,y) is continuous , partial derivative exit., but it is not differentiable at (0,0). see attached solution

f(x,y) will be continues, partial derivative will exist but it won't be differentiable at point (0,0).

f(x,y) is continuous , partial derivative exit., but it is not differentiable at (0,0)...i agree with deepak sir and I appreciate ..dear it's best explanation.. best regards.. bes...

PFA.