Question

What is the square root of -1?
A. -i
B. i
C. -1
D. 1

Answer 1

i

Explanation:

Answer 2

It is the option B that is 'i'.

B. i

Explanation:

Given :

The square root of -1 written as

`√(-1)`

When there is a negative number in the square root it is called as an imaginary number.

And imaginary number is denoted by 'i'

and the value for i is
`√(-1)`

for an example

`√(-3) = √(3)* √(-1)`

`= √(3)* i\\= √(3)i`

Hence the answer is 'i'.