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Questions  

The straight line x+2y9=0,3x+5y5=0 and ax+by1=0 are concurrent if the straight line 35x22y+1=0 passes through the point

a
(a,b)
b
(b,a)
c
(a,−b)
d
(−a,b)

detailed solution

Correct option is A

The three lines are concurrent if 1    2    −93    5    −5a    b    −1=0⇒35a−22b+1=0⇒35x−22y+1=0 passes through (a, b)

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If the lines ax+by+c = 0, bx+cy+a = 0 and cx+ay+b=0  abc are concurrent then the point of concurrency is


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