Как? 9**(1/2)=3.0

Answer 1

9 в 0.5 степени = корень из 9 = 3

Answer 2

1/2 = 0.5 = 50%
0.5*2 = 1 = 100%

9**0.5 = 3
3**2 = 9
3**2 is the same as 3*3
3**3 would be the same as 3*3*3 and so on..

Answer 3

It is a general mathematical fact/definition, that for a positive integer n and real number x, the expression x**(1/n) is just the n-th root of x, if it exists.

9**(1/2) is the square root of 9, which is 3.
8**(1/3) is the third root of 8, which is 2.

As the operation returns a floating point number, you will get the ".0" at the end.