Rational exponents

work like this: the numerator is the actual exponent of the base, while the denominator is the index of the root.
In other words, we have
![a^(m)/(n)=\sqrt[n]{a^m}](https://img.qammunity.org/2021/formulas/mathematics/middle-school/4ehssx7iqr8r2gfduzxwf7vgoh2toxad2a.png)
So, in you case, we have
![\sqrt[5]{x^3}=x^(3)/(5)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/2kipaiheqi9bd5qhf70pe7zwfmz5v6g1dx.png)
Assuming that the question contanis a typo. If you actually mean
,
then you can write it as
