Among the complex numbers z which satisfies `|z-25i|<=15`, find the complex numbers z having least modulas ?

Among the complex numbers, z satisfying |z+1-i| le 1 , the number having the least positive argument is :

The complex number z which satisfies the Equation |(i+z)/(i-z)|=1 lies on

The complex number z , which satisfies the condition |(1+z)/(1-z)|=1 lies on

All complex number z which satisfy the equation |(z-6 i)/(z+6 i)|=1 lie on the

In the Argand diagram all the complex numbers z satisfying |z-4 i|+|z+4 i|=10 lie on a

All complex numers z, which satisfy the equation |(z-i)/(z+i)|=1 lie on the

If the complex number z=x+ iy satisfies the condition |z+1|=1 , then z lies on

The points representing the complex number z for which |z+3|^(2)-|z-3|^(2)=6 lie on

Show that the area of the triangle on the Argand diagram formed by the complex numbers z, zi and z+ zi is =(1)/(2) |z|^(2)

The complex plane of z=x+iy , which satisfies the equation |(z-5i)/(z+5i)|=1 , lies on