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[" Q2If the circles "],[qquad [x^(2)+y^(...

[" Q2If the circles "],[qquad [x^(2)+y^(2)+2ax+2by+c=0," and "x^(2)+y^(2)+2bx+2ay+c=0],[" where "c>0," have exactly one point in common then the value of ",((a+b)^(2))/(2c)," is "],[[" (A) "1," (B) "sqrt(2)," (C) "2," (D) "1/2]]]

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