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[" The y-axis is the directrix of the el...

[" The y-axis is the directrix of the ellipse with eccentricity "e=1/2" and the corresponding focus is at "],[(3,0)" ,equation to its auxiliary circle is "],[[" (A) "x^(2)+y^(2)-8x+12=0," (B) "x^(2)+y^(2)-8x-12=0],[" (C) "x^(2)+y^(2)-8x+9=0," (D) "x^(2)+y^(2)=4]]

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