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If one of the diameters of the circle x2+y2–2x–6y+6=0 is a chord of another circle ‘C′ whose center is at (2,1), then its radius is

Answer» If one of the diameters of the circle x2+y22x6y+6=0 is a chord of another circle C whose center is at (2,1), then its radius is


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