Question

Q3): Let f(z) be an analytic ,then (

∂

2

∂x

2 +

∂

2

∂y

2

) |f(z )|

2

equals

a): |f′(z )|

2 b): 2 |f′(z )|

2

c): 3|f′(z )|

2 d): 4|f′(z )|

2​

Answer 1

Answer:

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Step-by-step explanation:

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