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JEE Mains · Maths · STD 11 - 10.1 circle and system of circle

रेखा \(x = y\) एक वृत्त को बिन्दु \((1,1)\) पर स्पर्श करती है। यदि यह वृत्त बिन्दु \((1,-3)\) से भी होकर जाता है, तो इसकी त्रिज्या है

  1. A \(3\sqrt 2\)
  2. B \(3\)
  3. C \(2\)
  4. D \(2\sqrt 2\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(2\sqrt 2\)

Step-by-step Solution

Detailed explanation

Equation of circle is given as \(S + \lambda L = 0\) \({\left( {x - 1} \right)^2} + {\left( {y - 1} \right)^2} + \lambda \left( {x - y} \right) = 0\) through \(\left( {1, - 3} \right)\) \(16 + \lambda \times 4 = 0 \Rightarrow \lambda = - 4\)…
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