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[" A variable straight line passes throu...

[" A variable straight line passes through a fixed point "(a,b)" intersecting the "],[" coordinates axes at "A" and "B" .If "O" is the origin,then the locus of the centroid of "],[Delta OAB" is "],[[" a."bx+ay-3xy=0," b."bx+ay-2xy=0],[" c."ax+by-3xy=0," d."ax+by-2xy=0]]

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