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[" (3) "x^(2)+y^(2)-6y-5=0],[" If a and ...

[" (3) "x^(2)+y^(2)-6y-5=0],[" If a and "c" are positive real number and the ellipse "(x^(2))/(4c^(2))+(y^(2))/(c^(2))=1" has four distinct points in common "],[" with the circle "x^(2)+y^(2)=9a^(2)," then "],[[" (1) "6ac+9a^(2)-2c^(2)>0," (2) "9ac-9a^(2)-2c^(2)<0],[" (a) "a=2," and "a=0]]

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