Mark the Correct alternative in the following:

A real value of x satisfies the equation if a² + b² =

Mark the Correct alternative in the following:

If z = a + ib lies in third quadrant, then also lies in the third quadrant if

Mark the Correct alternative in the following:

If where z = 1 + 2i, then |f(z)| is

Mark the Correct alternative in the following:

The complex number z which satisfies the condition lies on

Mark the Correct alternative in the following:

If z is a complex number, then