1.

If ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 represents apair of parallel lines then sqrt((g^(2)-ac)/(f^(2)-bc))=

Answer»

`(a)/(B)`
`SQRT((a)/(b))`
`sqrt((b)/(a))`
`(b)/(a)`

ANSWER :B


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