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If a^2+b^2-c^2-2ab, then the point of co...

If `a^2+b^2-c^2-2ab`, then the point of concurrency of family of straight lines ax+by+c=0 lies on line

A

y=x

B

y=x+1

C

y=-x

D

y+x=1

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-STRAIGHT LINES-PRACTICE SHEET (EXERCISE-III Problems on point of intersection of lines and concurrency of lines) (LEVEL- I Straight Objective Type Question)
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  2. The number of points P(x, y) with natural numbers as coordinates that ...

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  3. If a,b,c are the sides of Delta ABC and the lines ax+by+c=0, bx+cy+a=...

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  4. If lines x+2y-1=0, ax+y+3=0, and bx-y+2=0 are concurrent, and S is the...

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  5. If a,b,c are the p^(th),q^(th),r^(th) terms in H.P. then |{:(bc,p,1),(...

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  6. The equation of the line passing through the point of intersection of ...

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  7. If a,b,c are the three consecutive odd numbers then the line ax-by+c=0...

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  8. The straight lines 4ax+3by+c=0, where a+b+c=0, are concurrent at the p...

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  9. The point of concurrence of the lines (a+2b)x+(a-b)y+(a+5b)=0 is

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  10. If a^2+b^2-c^2-2ab, then the point of concurrency of family of straigh...

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  11. If 4a^2+9b^2c^2+12ab=0 then the family of straight lines ax+by+c=0 is ...

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  12. If the line x=a+m, y=-2 and y=mx are concurrent, then least value of a...

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  13. If the X line y=m,x , r = 1,2,3 cut off equal intercepts on transvers...

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  14. The line parallel to the x-xis and passing through the intersection of...

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  15. Line (1+lambda)x+(4-lambda)y+(2+lambda)=0 and (4-lambda)x-(1+lambda)y+...

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  16. If the line a1x+b1y=1,a2x+b2y=1,a3x+b3y=1 are concurrent then the...

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  17. Given a family of lines a (2x+y+4) +b(x-2y-3)=0. The number of line be...

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  18. The line x+y=1 meets the lines represented by equation y^2-6cy^2+11x^2...

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  19. Consider the points A(0,1) and B (2,0) and P be a point on the line 4x...

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  20. Area of the parallelogram formed by the lines y=mx,y=mx+1, y=nx and y=...

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