Question #d169c

1 Answer
EZ as pi
Sep 7, 2016

It is undefined - it is an imaginary/non-real number.

Explanation:

The 4th root is the same as the square root of a square root.

#sqrt (sqrt -16)# is undefined because it is a non-real or imaginary number.

It is not possible to find any even root of a negative number.

To deal with this further requires using complex numbers.

Related questions
See all questions in Square Roots and Irrational Numbers
Impact of this question
2758 views around the world
You can reuse this answer
Creative Commons License