Chapter 4, Problem 7SGR

To determine

To justify: The given complex number is pure imaginary number or not.

Answer to Problem 7SGR

The number $6i$ is called pure imaginary number.

Explanation of Solution

Given information:

The given complex number is $6i$ .

Calculation:

Calculate the complex number,

The standard form of complex no $a+bi$ , where $a,b$ are real no and $i$ is imaginary unit.

A complex number is real number $a$ , or pure imaginary number $bi$ , or sum of both

Therefore, the number $6i$ is called pure imaginary number.