1.

The straight lines `x+2y-9=0,3x+5y-5=0`, and `a x+b y-1=0`are concurrent, if the straight line `35 x-22 y+1=0`passes through the point`(a , b)`(b) `(b ,a)``(-a ,-b)`(d) none of theseA. (a,b)B. `(b,c)`C. `(a,b)`D. `(-a,b)`

Answer» Correct Answer - A
The three lines of are concurrent if
`|{:(,1,2,-9),(,3,5,-5),(,a,b,-1):}|`
`rArr 35a - 22b + 1 = 0 rArr 35x - 22y + 1=0` passes through (a,b)


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