The value of ‘a’ for which the common chord of the circles C 1 : x 2 + y 2 = 8 and C 2 …
Mathematics · JEE Advanced · NTA Exams — Co-ordinate Geometry
The value of ‘a’ for which the common chord of the circles C1 : x2 + y2 = 8 and C2 : (x – a)2 + y2 = 8 subtends a right angle at the origin are :
- ± \(\sqrt{2}\)
- ± 2
- ± 4
- none of these
Answer
(C) ± 4
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