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Which of the following is/are true ? T...

Which of the following is/are true ?
The circles `x^(2)+y^(2)-6x+6y+9=0` are such that :

A

They do not intersect

B

They touch each other

C

Their exterior common tangents are parallel

D

Their interior common tangents are perpendicular

Text Solution

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The correct Answer is:
A, C, D
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