WBJEE · Maths · Straight Lines
The straight lines \(x+2 y-9=0,3 x+5 y-5=0\) and \(a x+\) by \(-1=0\) are concurrent if the straight line \(35 x-22 y+\) \(1=0\) passes through the point
- A \((-a,-b)\)
- B \((a,-b)\)
- C \((-a, b)\)
- D \((a, b)\)
Answer & Solution
Correct Answer
(D) \((a, b)\)
Step-by-step Solution
Detailed explanation
Hint : \(\left|\begin{array}{lll}a & b & -1 \\ 1 & 2 & -9 \\ 3 & 5 & -5\end{array}\right|=0 \Rightarrow 35 a-22 b+1=0\)
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