Question

The point (0, 0) lie ___________ the circle x^2+y^2-2x-4y=0.

(a) inside circle

(b) outside circle

(c) on the circle

(d) either inside or outside

This question was addressed to me in a job interview.

This interesting question is from Conic Sections topic in section Conic Sections of Mathematics – Class 11

Answer 1

The correct option is (c) on the circle

The best I can explain: Circle has equation x^2+y^2-2x-4y=0.

0^2+0^2-2*0-4*0+0 = 0 so, point is on the circle.