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Equation x^(2)+m(1)y^(2)+m(2)xy=0 jointl...

Equation `x^(2)+m_(1)y^(2)+m_(2)xy=0` jointly represents a pair of perpendicular lines if

A

`m_(1)=-1`

B

`m_(1)=2m_(2)`

C

`m_(2)=2m_(1)`

D

`m_(1)m_(2)=-1`

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The correct Answer is:
A
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