Question 140821
Do you mean {{{root(3,24)}}}??  If so, then the index is 3, and the 24 (what is inside the radical sign!) is called the radicand.


For a detailed explanation of this see my website by clicking on my tutor name "rapaljer" anywhere in algebra.com.  Take the first link which is "Basic, Intermediate, or College Algebra: One Step at a Time."  Click on "Basic Algebra", then "Chapter 5", and look for Section 5.02 Cube Roots and More.  My explanations here are for students who don't understand the traditional textbooks.  


R^2