Hey guys,
the task: Evaluate. Show necessary steps using exponent laws.
1. (-125)^-2/3
my answer:
1
---------
-125^2/3
= 1
-------------------
cube root of 125^2
= 1
-----
25
Is that right?
2. (2n^1/3r^-2)^0
How can I evaluate?
Explain what further? Plato gave an indication why any number (except 0) to the 0 power is 1. But you had already said that you knew that. If you are asking how that is relevant to this question, as long as neither n nor r is 0, $\displaystyle (2n^{1/3}r^{-1/2})^0$ is a non-zero number to the 0 power.