KCET 2007 Math Solved Paper

Question : 21 of 60

Marks: +1, -0

x2+y2−6x−6y+4=0,x2+y2−2x−4y+3=0,x2+y2+2kx+2y+1=0 If the Radical centre of the above three circles exists, then which of the following cannot be the value of k ?