CUSAT 2021 BTech Solved Paper Shift 2
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If the locus of a point which moves so that the line joining the points of contacts of the tangents drawn from it to the circle x 2 + y 2 = b 2 touches the circle x 2 + y 2 = a 2 , is the circle x 2 + y 2 = c 2 , then a , b , c are in
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