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

वृत्त, जिसका केन्द्र प्रथम चतुर्थाश में रेखा \(x + y =2\) पर है तथा जो दोनों रेखाओं \(x =3\) तथा \(y =2\) को स्पर्श करता है, का व्यास है

  1. A \(12\)
  2. B \(9\)
  3. C \(3\)
  4. D \(6\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(3\)

Step-by-step Solution

Detailed explanation

\(\because\) center lies on \(x+y=2\) and in 1 st quadrant center \(=(\alpha, 2-\alpha)\) where \(\alpha>0\) and \(2-\alpha>0 \Rightarrow 0<\alpha<2\) \(\because\) circle touches \(x=3\) and \(y=2\) \(\Rightarrow \quad|3-\alpha|=|2-(2-\alpha)|=\) radius…
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