Sufficient Condition for Differentiability| Cauchy Riemann Equations - Lec 15

Sufficient condition for Differentiability is discussed.

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[manasa]

In my paper of complex analysis, have this question, 1. necessary and sufficient condition for differentiability of f(z) and also derive necessary condition for a function f(z) to be differentiable to zo ? Then can I write on exam anses of ur two videos both necessary and sufficient solutions ??? Or not

[nighatlone]

Sir why we are taking episoln functions here