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The circle represented by the equation x...

The circle represented by the equation `x ^(2) + y^(2) + 2gx + 2fy + c=0` will be a point circle, if

A

`g^2+f^2=C`

B

`g^2+f^2+c=0`

C

`g^2+f^2gtc`

D

none of these

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The correct Answer is:
A
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MAHAVEER PUBLICATION-CO-ORDINATE GEOMETRY OF TWO DIMENSIONS (CONIC SECTION)-QUESTION BANK
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  13. Find the equation of the circle with centre(-2,1) and radius 3

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