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

वृतों \(x ^{2}+ y ^{2}=4\) तथा \(x ^{2}+ y ^{2}+6 x +8 y -24=0\) की उभयनिष्ट स्पर्श रेखा निम्न में से किस बिन्दु से होकर जाती है ?

  1. A \((-4, 6)\)
  2. B \((6, -2)\)
  3. C \((-6, 4)\)
  4. D \((4, -2)\)
Verified Solution

Answer & Solution

Correct Answer

(B) \((6, -2)\)

Step-by-step Solution

Detailed explanation

Circle \({x^2} + {y^2} = 4\) \( \Rightarrow {c_1}\left( {0,0} \right);{r_1} = 2\) and circle \({x^2} + {y^2} + 6x + 8y - 24 = 0\) \( \Rightarrow {c_2}\left( { - 3,4} \right);{r_2} = 7\) \( \Rightarrow d = {c_1}{c_2} = 5\) also \(d = \left| {{r_1} - {r_2}} \right|\) circles touch…
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