CircleEasy
Question
The equation k (x2 + y2) − x − y + k = 0 represents a real circle, if-
Options
A.k < √2
B.k > √2
C.k > 1 / √2
D.0 < |k| ≤ 
More Circle Questions
The equation of the tangent to the circle x2 + y2 = 25 which is inclined at 60o angle with x-axis, will be-...Two parabolas have the same focus. If their directrices are the x-axis & the y-axis respectively, then the slope of thei...If the lines 3x - 4y - 7 = 0 and 2x - 3y - 5 = 0 are two diameters of a circle of area49π square units, the equatio...The equation of the radical axis of circles 7x2 + 7y2 − 7x + 14 y + 18 = 0 & 4x2 + 4y2 − 7x + 8y + 20 = 0 is...Circles are drawn touching the co-ordinate axis and having radius 2, then -...