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[" 20.All chords of the curve "x^(2)+y^(...

[" 20.All chords of the curve "x^(2)+y^(2)-10x-4y+4=0," which "],[" make a right angle at "(8,-2)" pass through "],[[" (a) "(2,5)," (b) "(-2,-5)],[" (c) "(-5,-2)," (d) "(5,2)]]

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