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Let S be the set of points in the complex plane...

This question belongs to Engineering Maths Complex Variable
Complex Variable
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Let S be the set of points in the complex plane corresponding to the unit circle. (That is, S = {z : |z| = 1}. Consider the function f(z) = zz∗ where z∗ denotes the complex conjugate of z. The f(z) maps S to which one of the following in the complex plane

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Correct Answer: Option C
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