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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

-2

B

3

C

1

D

0

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The correct Answer is:
C
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HIMALAYA PUBLICATION-Pair Of Lines-QUESTION BANK
  1. If one of the lines of the pair a x^(2)+2 h x y+b y^(2)=0 bisects the ...

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  2. If the slope of one line is twice the slope of the other in the pair o...

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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 concurre...

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  4. If the angle 2 theta is acute, then the acute angle between the pair o...

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  5. If the coordinate axes are the bisectors of the angles between the pai...

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  6. If the pair of lines given by a x^(2)+2 h x y+b y^(2)=0 (h^(2)>a b) fo...

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  7. The area of the triangle formed by the lines x^(2 )+4 x y+y^(2)=0, x+y...

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  8. The product of the perpendicular distances from the origin on the pair...

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  9. The centroid of the triangle formed by the pair of lines 12 x^(2)-20 x...

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  10. If m is the slope of one of the lines represented by ax^(2)+2hxy+by^(2...

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  11. The perpendicular distance between the lines 9 x^(2)-24 x y+16 y^(2)+2...

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  12. If the line px +qy =0 coincides with one of the lines given by ...

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  13. Let PQR be a right-angled isosceles triangle right-angled at P(2, 1). ...

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  14. If one of the lines of my^(2)+(1-m^(2))xy-mx^(2)=0 is a bisector ...

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  15. If the gradient of one of the lines given by x^(2)+2 h x y+2 y^(2)=0 i...

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  16. The angle between the lines x^(2)-y^(2)-2 x-1=0 is

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  17. The product of perpendiculars let fall from the point (x(1), y(1)) upo...

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  18. Equation of pair of lines drawn through (1, 1) and perpendicular to th...

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  19. The equatio y^(2)-x^(2)+2x-1=0 represents

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  20. The equation 4 x^(2)-24 x y+11 y^(2)=0 represents

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