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If the pair of lines x y-x-y+1=0 and the...

If the pair of lines `x y-x-y+1=0` and the line `a x+2 y-3=0` are concurrent then `a=`

A

-1

B

0

C

3

D

1

Text Solution

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The correct Answer is:
D
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HIMALAYA PUBLICATION-Pair Of Lines-QUESTION BANK
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  2. The slope of one of the lines 2 x^(2)+3 x y+lambda y^(2)=0 is 2, then...

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  3. If the pair of lines x y-x-y+1=0 and the line a x+2 y-3=0 are concurr...

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  4. The equation a x^(2)+b y^(2)+c x+c y=0, c ne 0 represents a pair of l...

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  5. If x^(2)-k x y-y^(2)+2 y+2=0 represents a pair of lines than the valu...

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  6. The equation to the pair of lines passing through (1,-1) and parallel ...

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  7. The equation 9 x^(2)+24 x y+b^2 y^(2)-12 x+16 y-12=0 represents a pai...

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  8. Distance between the pair of lines represented by the equation x^(2)-...

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  9. The join of (-3,2) and (4,6) is cut by x -axis in the ratio

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  11. If one of the pair of lines represented by a x^(2)+2 h x y+b y^(2)=0 i...

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  12. If one of the pair of lines represented by 6 x^(2)+2 h x y-3 y^(2)=0 i...

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  13. The angle between the pari of lines represented by x^(2)-7xy+12y^(2)...

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  14. The distance between the parallel lines given by (x+7y)^(2)+4sqrt(2...

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  15. If the slope of one of the lines represented by ax^(2)-6xy+y^(2)=0 is...

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  16. If the pair of lines a x^(2)+2 h x y-a y^(2)=0 and b x^(2)+2 g x y-b y...

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  17. If the pairs of lines 3x^(2)-2pxy-3y^(2)=0 and 5x^(2)-2qxy-5y^(2)=0...

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  18. The equation x-y=4 and x^(2)+4xy+y^(2)=0 represent the sides of

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  19. If a x^(2)+2 h x y+b y^(2)+2 g x+2 f y+c=0 represents a parallel lines...

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  20. If x^(2)-k x y-y^(2)+2 y+2=0 represents a pair of lines than the valu...

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