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

यदि चर रेखा \(3 x +4 y =\alpha\), दो वत्तों \(( x -1)^{2}+( y -1)^{2}=1\) तथा \(( x -9)^{2}+( y -1)^{2}=4\) के बीच इस प्रकार स्थित है कि यह किसी मी वत्त से जीवा नहीं बनाती, तो \(\alpha\) के समी पूर्णाक मानों का योग है .......... 

  1. A \(164\)
  2. B \(166\)
  3. C \(165\)
  4. D \(199\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(165\)

Step-by-step Solution

Detailed explanation

Both centres should lie on either side of the line as well as line can be tangent to circle. \((3+4-\alpha) \cdot(27+4-\alpha)\,<\,0\) \((7-\alpha) \cdot(31-\alpha)<0 \Rightarrow \alpha \in(7,31) \quad \ldots(1)\) \(d_{1}=\text { distance of }(1,1) \text { from line }\)…
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