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If the pair of lines ax^2 +2hxy+ by^2+ 2...

If the pair of lines `ax^2 +2hxy+ by^2+ 2gx+ 2fy +c=0` intersect on the y-axis then

A

`2fgh = bg^(2)+ch^(2)`

B

`bg^(2)ne ch^(2)`

C

`abc=2fgh`

D

none of these

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A
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MCGROW HILL PUBLICATION-CARTESIAN SYSTEM OF RECTANGULAR COORDINATES AND STRAIGHT LINES -QUESTIONS FROM PREVIOUS YEARS. (AIEEE/JEE MAIN PAPERS)
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