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If the equation 9x^(2)+24xy+by^(2)-12x+2...

If the equation `9x^(2)+24xy+by^(2)-12x+2fy-12=0` represents a pair of parallel lines, the f=

A

`-4`

B

`-3`

C

`-8`

D

`-12`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-PAIR OF STRAIGHT LINES-PRACTICE EXERCISE
  1. If two sides of a triangle lie along 3x^(2)-xy-2y^(2)=0 and its orthoc...

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  2. If 9x^(2)-24xy+ky^(2)-12x+16y-12=0 represents a pair of parallel lines...

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  3. If the equation 9x^(2)+24xy+by^(2)-12x+2fy-12=0 represents a pair of p...

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  4. If the distance between the pair of parallel lines x^(2)+2xy+y^(2)-8ax...

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  5. The length of the intercept on the x-axis cut by the pair of lines 2x^...

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  6. The length of the intercept on the y-axis cut by the pair of lines 2x^...

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  7. The product of perpendiculars from origin to the pair of lines 2x^(2)+...

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  8. The equation of the pair of lines passing through (3, 2) and perpendic...

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  9. The figure formed by the pairs of lines 12x^(2)+7xy-12y^(2)=0 and 12x^...

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  10. The figure formed by the pairs of lines 3x^(2)+10xy+3y^(2)=0 and 3x^(2...

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  11. The sides of a parallelogram are given by 6x^(2)+7xy+2y^(2)=0 and 6x^(...

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  12. The equation of the diagonal passing through the origin of the paralle...

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  13. If 2x^(2)-5xy+3y^(2)=0 represents two adjacent sides of a parallelogra...

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  14. The equation to pair of opposite sides of a parallelogram are x^(2)-7x...

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  15. If the pair of lines 6x^(2)+7xy+2y^(2)=0,6x^(2)+7xy+2y^(2)-5x-3y+1=0 f...

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  16. If the pair of lines 2x^(2)-5xy+2y^(2)=0 forms a parallelogram with pa...

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  17. The area of rectangle formed by the pair of lines xy-x-2y+2=0 and xy-3...

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  18. Area of quadrilateral formed by two pair of lines x^(2)-y^(2)-3(x+y)=0...

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  19. The condition that the lines joining origin to the points of intersect...

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  20. The lines joining the origin to the points of intersection of x+2y=k w...

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