1.

Consider a fixed parabola C _(1) -=x ^(2) + y =0. A set of varying parabola (s) C thouches C _(1) at origin. Out of such curves C, a set of parabola (s)C_(2) are selected having vertex (-9,3). The possible coordinate of foci of parabola (s) C_(2) is/are

Answer»

`(6, -6)`
`(-6, 6)`
`((15)/(2), - (15)/(4))`
`((7)/(2), - (7)/(4))`

ANSWER :B


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