1.

Through a point A on the x-axis, a staight line is drawn parallel to the y-axis so as to meet the pair of straight lines ax^2+2hxy+by^2=0 at B and C. If AB=BC, then

Answer»

`h^2=4ab`
`8h^2=9ab`
`9h^2=8ab`
`4h^2=ab`

ANSWER :B


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