2500 的1/20 次方

very easy,,, indeed, there are several methods
a) Simpliest:(those switch, from left to right, from up to down)
2500
shift
X^y(column 5, row 2)
20
=
b) Make use of 1/x
2500
X^y(column 5, row 2)
20
1/X(column 2, row 3)
=
(and u can also make use of Memory for other methods)

2500^(1/20)