When 3^4√2 written as an entire radical 4√n= ?
3^4√2
81√2
4√(81^2/16 * 2)
4√(6561/8)
somehow I doubt that's what you were after
if by 4√n you mean 4th root (∜n) I'm also confused.
3^∜2 is trés bizarre.
Try again using ^ for exponents and √ for square root, and ∜ for 4th root.