AP EAMCET · Maths · Circle
If \(2 k x+3 y-1=0,2 x+y+5=0\) are conjugate lines with respect to the circle \(x^2+y^2-2 x-4 y-4=0\), then \(k=\)
- A 3
- B 4
- C 1
- D 2
Answer & Solution
Correct Answer
(C) 1
Step-by-step Solution
Detailed explanation
Let point \(\left(x_1, y_1\right)\) lie on the line \(2 k x+3 y-1=0\). \(x^2+y^2-2 x-4 y-4=0\) Given circle, \(x^2+y^2-2 x-4 y-4=0\) Equation of chord of contact from \(\left(x_1, y_1\right)\) to the circle…
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