In Problem, (a) show that the given function is not analytic at any point but is different...

In Problem, (a) show that the given function is not analytic at any point but is differentiable along the indicated curve(s), and (b) use (1) or (2) to find the derivative of the function on the curve(s).

 (1)

 (2)

f(z) = x2 + y2 + 2ixy; x-axis