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[" 25.If "x^(2)+y^(2)+2hxy+2gx+2fy+c=4" ...

[" 25.If "x^(2)+y^(2)+2hxy+2gx+2fy+c=4" represents a circle,then the condition for that "],[" circle to pass through three quadrants only but not through origin is given by "],[[" Wr^2 > c "," 2) "g^(2)>c," (s) "c>0," (4) "h>oo]]

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