Question: 4. Prove that the function f(2) = |2| is differentiable only at z = 0. 5. Determine the points where the function f(z) =

4. Prove that the function f(2) = |2| is differentiable only at

4. Prove that the function f(2) = |2| is differentiable only at z = 0. 5. Determine the points where the function f(z) = x + iy is differentiable. Find the value of f'(2). Ans. Points z = x + ix, f'(x + ix) = 2x

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