The complex number `z` is purely imaginary , if

Consider a complex number w=(z-1)/(2z+1) where z=x+iy, where x,y in R . If the complex number w is purely imaginary then locus of z is

If a complex number Z is purely imaginary then conjugate of Z is

If a complex number Z is purely imaginary then conjugate of Z is

A non-zero complex number z is said to be purely imaginary if

The image of a complex number z in the imaginary axis is (A) z (B) iz (C) - z (D) -i z

If the number (z-1)/(z+1) is purely imaginary, then

The sum of two complex numbers a+ib and c+id is purely imaginary if

if the number (z-2)/(z+2) is purely imaginary then find the value of |z|

Let z be a complex number such that the imaginary part of z is nonzero and a = z^2 + z + 1 is real. Then a cannot take the value