If the two circles x^ 2 +y^ 2 +2 a x+c=0 and x^ 2 +y^ 2 +2 b y+c=0 are touching each…
Mathematics · JEE Main · NTA Exams — Co-ordinate Geometry
If the two circles \(x^{2}+y^{2}+2 a x+c=0\) and \(x^{2}+y^{2}+2 b y+c=0\) are touching each other, then
- \(\frac{1}{a^{2}}+\frac{1}{b^{2}}=\frac{1}{c^{2}}\)
- \(a^{2}+b^{2}=c^{2}\)
- \(\frac{1}{a^{2}}+\frac{1}{b^{2}}=\frac{1}{c}\)
- None of these
Answer
(D) None of these
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