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Consider points A(sqrt13,0) and B(2sqrt1...

Consider points `A(sqrt13,0) and B(2sqrt13,0)` lying on x-axis. These points are rotated anticlockwise direction about the origin through an angle of `tan^-1(2/3)`. Let the new position of A and B be A' and B' respectively. With A' as centre and radius `2sqrt13/3` a circle `C_1` is drawn and with B' as centre and radius `sqrt13/3` circle `C_2`, is drawn. The radical axis of `C_1 and C_2` is

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