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Intercept made by the circle zbar z +b...

Intercept made by the circle ` zbar z +bar a+abar z+r=0` on the real axis on complex plane is `sqrt((a+ bar a )-r)` b. `sqrt((a+ bar a )^2-r)` c. `sqrt((a+ bar a )^2-4r)` d. `sqrt((a+ bar a )^2-4r)`

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