The simplification of the expression (81^ 1/4)^ 4 is 81.
<u>Step-by-step explanation</u>:
(a^m)^n = a^(m
n) -----------(1)
From the expression (81^ 1/4)^ 4,
a = 81
m = 1/4
n = 4
Substitute the above values in (1),
(81^ 1/4)^ 4 = 81^(1/4
4)
(81^ 1/4)^ 4 = 81^(1)
The simplification of the expression is 81.