1.

Three circles touch one another externally. If the tangents at their points of contact meet at a point whose distance from a point of contact is 4, then the ratio of product of radii to the sum of the radii of the circles, is

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Three circles touch one another externally. If the tangents at their points of contact meet at a point whose distance from a point of contact is 4, then the ratio of product of radii to the sum of the radii of the circles, is



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