Question 473120
What is the index of a radical? When working with radicals can the radicand be negative when the index is odd? Can it be negative when the index is even?
----------------
The index is the root number:
---
The radicand can be negative:
If the index is odd and the radicand is negative the root is negative.
Example: cbrt(-27) = -3
-------------------------------------
If the root is even and the radicand is negative the root is complex.
Example: sqrt(-27) = 3sqrt(3)i
-------------------------------------
Cheers,
Stan H.