[" If "2x^(2)+lambda xy+2y^(2)+(lambda-4...

[" If "2x^(2)+lambda xy+2y^(2)+(lambda-4)x+6y-5=0" is the gquation of a circle then its "],[" radiusis "],[[" (a) "3sqrt(2)," (b) "2sqrt(3)],[" (c) "2sqrt(2)," (d) none of these "]]

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