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[" 3.Two thin rods "AB&" CD of lengths "...

[" 3.Two thin rods "AB&" CD of lengths "2a&2b" move along ox "8" .OY respectively,when' "O" ' is the origin The "],[" equation of the locus of the centre of the circle passing through the extremities of the two rads is: "],[[" (A) "x^(2)+y^(2)=a^(2)+b^(2)," (B) "x^(2)-y^(2)=a^(2)-b^(2)," (C) "x^(2)+y^(2)=a^(2)-b^(2)," (D) "x^(2)-y^(2)=a^(2)+b^(2)]]

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