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Equation of tangent drawn to circle abs(...

Equation of tangent drawn to circle `abs(z)=r` at the point `A(z_(0))`, is

A

Re `((z)/(z_0))=1`

B

Re `((z_0)/(z))=1`

C

lm `((z)/(z_0))=1`

D

`lm((z_0)/(z))=1`

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A
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