Let fo.u) = O XN= (,0) hen ctt (Go) a fo4) IS nat conhou.a 6Hay) ii ao_ dthentiahle f) 1 co0tinuau but hoat dthexentiable- (d)fa canti nucauy and diffeoreatiable
Function is not continuous at (0,0). Try substituting y = mx.. You'll see that 'm' still appears after applying the limit, and therefore, function is not continuous at the origin. ...