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If x^(2) + y^(2) + 2gx + 2fy +1=0 repres...

If `x^(2) + y^(2) + 2gx + 2fy +1=0` represents a pair of straight lines, then `f^(2) + g^(2)` is equal to a)0 b)1 c)2 d)4

A

0

B

1

C

2

D

4

Text Solution

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The correct Answer is:
B
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