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If the lines lx + my + n = 0, mx + ny + ...

If the lines lx + my + n = 0, mx + ny + l = 0 and nx + ly + m = 0 are concurrent then

A

`|(1m' - 1'm)/(11' - mm')|`

B

`|(1 m' +1'm)/(11' + mm')|`

C

`|(1m'- 1'm)/(11' + mm')|`

D

`|(1m' +1'm)/(11' - mm')|`

Text Solution

Verified by Experts

The correct Answer is:
C
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PUNEET DOGRA-POINT & LINE -PREV YEAR QUESTIONS
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  2. Consider the following statements : I . The distance between the lin...

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  4. The second degree equation x^(2) + 4y - 2x -4y + 2= 0 represents

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  5. The distance between the lines 4x + 3y = 11 and 8x + 6y = 15 is

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  7. Two straight lines x - 3y - 2 = 0 and 2x - 6y - 6 =0

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  8. What is the equation of the straight line passing through the point (2...

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  9. If p is the length of the perpendicular from the origin to the line (x...

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  10. What is the equation of the line passing through the point of intersec...

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  11. What is the equation of the straight line cutting off an intercept 2 f...

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  12. What is the angle between the straight lines (m^(2) - mn) y = (mn + n^...

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  13. The ratio in which y -axis divides the line segment joining (3,4) and ...

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  14. The points (a , b) (0,0) , (-a , -b) and (ab ,b^(2)) are :

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  15. The angle between the lines x + y - 3 = 0 and x - y + 3 = 0 is alpha a...

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  16. The equation of a straight line which cuts off an intercept of 5 units...

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  17. The distance of the point (1 , 3) from the line 2x + 3y = 6 measured p...

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  18. What is the point of intersection of the lines 2x + 3y = 5 and 3x - 4y...

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  19. If the vertex of a triangle is (1 , 1) and the midpoints of two sides ...

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  20. The incetre of the triangle with vertices (1,sqrt(3)),(0,0) and (2,0) ...

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