Question

If a complex number Z is purely real , then conjugated of Z is
1)-Z
2)Z
3)0
4)none of these
​

Answer 1

Answer:

non of these

Step-by-step explanation:

because ifZis an purely intezae so his value becomes+ve-ve and 0

Answer 2

Answer:

If a complex number Z is purely real , then conjugated of Z is

2)Z

Let us prove the above given answer with steps :

Suppose z= x + iy

Means conjugate z'= x - iy

And as per question z=z'

It means x=x and y=-y which implies y must be equal to 0.

That prove z=z'

Hope you find my answer useful!!