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[" A line meets the co-ordinate axes in A circle is circumscribed about the triangle OAB .If "],[" the distances of the tangent to the circle at the origin O from the points A and B respectively,the dian "],[" circle is: "],[[" (A) "(2d_(1)+d_(2))/(2)," (B) "(d_(1)+2d_(2))/(2)," (C) "d_(1)+d_(2)," (D) "(d_(1)d_(2))/(d_(1)+d_(2))]]

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