1.

If two vertices of an equilateral triangle are A ( -a,0) and B( a,0 ), a gt0and the third vertex C lies above x-axis , then the equation of the circumcircle of Delta ABCis

Answer»

`3x^(2) +3y^(2) -2sqrt3ay =3A^(2) `
` 3x^(2) +3y^(2) -2ay=3a^(2) `
` X^(2) +y^(2) -2ay =a^(2) `
`x^(2) +y^(2) -sqrt3 ay = a^(2) `

ANSWER :A


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