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Questions  

One of the diameters of the circle  

x2+y212x+4y+6=0 is given by 

a
x+y=0
b
x+3y=0
c
x=y
d
3x+2y=0

detailed solution

Correct option is C

The coordinates of the centre of the circle x2+y2−12x+4y+6=0 are  (6,−2)Clearly, the line x+3y=0 passes through this point Hence, x + 3 y = 0 is a diameter of the given circle

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