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If the equation kxy+10x+6y+4=0 represent...

If the equation `kxy+10x+6y+4=0` represents a pair of lines then : `k=`

A

12

B

13

C

15

D

16

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MARVEL PUBLICATION-PAIR OF STRAIGHT LINES-TEST YOUR GRASP
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  11. If the angle between the lines ax^(2)+xy+by^(2)=0 is 45^(@), then

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  13. If 3h^(2)=4ab, then the ratio of the slopes of the lines ax^(2)+2hxy+b...

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  14. Lines represented by the equation 5x^(2)-2xy+2y^(2)=0 are

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  16. Measure of angle between the lines sqrt(2)(x^(2)+y^(2))=4xy is

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