great bhaiya!!
but xam me tin minute itna kuchh kaise sochenge [2] [12]
The equation | z – z1|^2 + | z – z2|^2 = k (where k is a real number) will represent a circle if
(A) k≥1/2 | z1 – z2|^2
(B) k≤1/2 | z1 – z2|^2
(C) k≤1/2 | z1+ z2|^2
(D) k≥1/2 | z1+ z2|^2
[isko dekhke esy laga tha... par pata nhi kyun ni bana [2]]
Please check http://www.goiit.com/posts/list/algebra-complex-number-q1-95556.htm#436392