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A staight line passing through O (0,0) i...

A staight line passing through O (0,0) intersect the curve `(x-1)^2+(y-1)^2=1` at 'A' and 'B' and `(x-2)^2+y^2=1` at C and D . If OA,OC , OD and OB form an A.P. , then the equation of the line is …………… .

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y = x
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