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The equation x^(2)+alphaxy+betay^(2)=0 r...

The equation `x^(2)+alphaxy+betay^(2)=0` represents a pair of perpendicular lines , if

A

`alpha=2beta`

B

`beta=-1`

C

`2alpha=beta`

D

`alphabeta=-1`

Text Solution

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The correct Answer is:
B
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NIKITA PUBLICATION-PAIR OF STRAIGHT LINES-MULTIPLE CHOICE QUESTIONS
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  17. If the sum of the slopes of the lines given by 2x^(2)+kxy-3y^(2)=0 is ...

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