1.

a^(2)x^(2)+2xy+9y^(2)=0 represent a pair of distinct lines then 'a' lies in

Answer»

`[-(1)/(3),(1)/(3)]`
`(-(1)/(3),(1)/(3))`
`[-(1)/(2),(1)/(2)]`
`(-(1)/(2),(1)/(2))`

ANSWER :B


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