If `Re ((z + 2i)/(z+4))= 0 ` then z lies on a circle with centre :

If "Re"((z-8i)/(z+6))=0 , then z lies on the curve

if Im((z+2i)/(z+2))= 0 then z lies on the curve :

if Im((z+2i)/(z+2))= 0 then z lies on the curve :

If "Re"((z-8i)/(z+6))=0 , then lies on the curve

If |(z+i)/(z-i)|=sqrt(3) , then z lies on a circle whose radius, is

If |(z+i)/(z-i)|=sqrt(3) , then z lies on a circle whose radius, is

If Re ((z+3)/(z-2i))=0 then the locus of z = x +iy is

z is complex number such that (z-i)/(z-1) is purely imaginary. Show that z lies on the circle whose centres is the point 1/2 (1+i) and radius is 1/sqrt2