A triangle is formed by the lines x+y=0 , x-y=0 and lx+my=1 .
If l and m are the parameters such that $\large \bf l^2+m^2=1$ , then the locus of its circumcenter is

Question

mayankdevnani · Answer

Options are :-
$$\large \bf A) (x^2-y^2)^2=x^2+y^2$$
$$\large \bf B) (x^2+y^2)^2=(x^2-y^2)$$
$$\large \bf C) (x^2+y^2)^2=4x^2y^2+(x^2+y^2)$$
$$\large \bf D) (x^2-y^2)^2=(x^2+y^2)^2$$

hartnn · Answer

this doesn't seem difficult, 
what have you tried?

hartnn · Answer

|dw:1451373318171:dw|

x,y is just the mid-point of 2 intersection points,
I1, I2.