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The two circles : x^2+y^2 =ax and x^2+y^...

The two circles : `x^2+y^2 =ax` and `x^2+y^2=c^2` (c > 0) touch each other if :

A

`|n|=2 c`

B

`2|a|-c

C

|a|=c`

D

`a=2 c`

Text Solution

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The correct Answer is:
C
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HIMALAYA PUBLICATION-CIRCLES-QUESTION BANK
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