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The chord of contact of tangents drawn f...

The chord of contact of tangents drawn from a point on the circle `x^2 + y^2 = a^2` to the circle `x^2 + y^2 = b^2` touches the circle `x^2 + y^2=c^2` Show that a, b, c are in G.P.

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PATHFINDER-CIRCLE-QUESTION BANK
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  16. The number of common tangents that can be drawn to the circles x^2+y^2...

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