Multiple Choice Questions on if equation x sup2 y sup2 2gx 2fy c 0 represent a circle then find the condition on g f c for the ex........... for CDS Exam Preparation

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Multiple Choice Questions

if equation x sup2 y sup2 2gx 2fy c 0 represent a circle then find the condition on g f c for the ex...........

Quantitative Aptitude (CDS) Coordinate Geometry
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    if equation x²+y²+2gx+2fy-c=0 represent a circle then find the condition on g,f,c for the existence of the circle .

     

     g²+f²-c²=0

    Incorrect Answer

    g²+f²-c>0

    Incorrect Answer

     g²+f²-c=0

    Incorrect Answer

    g²+f²+c=0 

    Correct Answer
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    Explanation:

    radius of this circle =  √(g^2+f^2+c) 
    condition on g,f,c for the existence of the circle 
    radius = 0 
    so  g²+f²+c=0

    By: bhavesh kumar singh
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