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[" If the circle "x^(2)+y^(2)+2gx+2fy+c=...

[" If the circle "x^(2)+y^(2)+2gx+2fy+c=0" touches "],[[x" -axis,then "],[[" (a) "g=f," (b) "g^(2)=c(c),f^(2)=c(d)g^(2)+f^(2)=c],[" (b) "x^(2)+y^(2)],[" (c) "x^(2)+y^(2)=]," (d) "x^(2)+y^(2)+2]]

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