Question: Hello. Please help. Thank you. (4) Determine whether |z|2 has a derivative anywhere. [5] 22 +4 (5) Let f(z) = = z - 2i .

Hello. Please help. Thank you.

(4) Determine whether |z|2 has a derivative anywhere. [5] 22 +4 (5) Let f(z) = = z - 2i . if z # 2i, while f(2i) = 3 + 4i. [5] (a) Prove that limz-if(z) exists and determine its value (b) Is f(z) continuous at z = 2i ? Explain. (c) Is f(z) continuous at points z # 2i ? Explain

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