Khan Academy Nth Roots at Academy

Khan Academy Nth Roots. I tried 8^ before the square root symbol, but it is not right. We only use the negative root when there is a minus in front of the radical.

Fifth Root Of 243
Fifth Root Of 243 from virallistclub.com

I know the answer, but can't figure out how to type it. Created by sal khan.watch the next lesson: We could use the nth root in a question like this:

Fifth Root Of 243

Rewriting roots as rational exponents. There is a button for square root and cube root, but how do i get the 8th root? We could use the nth root in a question like this: Nth term divergence test here is the divergent test, very simple: