Please explain this formula how to system calculate this

Question

8**(1/3)

Answer 1

ⁿ√(x^m)=x^(m/n)
³√8=8^(1/3)= in py
>>> 8**(1/3)
2

Answer 2

8**(1/3) is the same as 8 exponent 1/3 just as 9**(1/2) is 9 exponent 1/2
And 9 exponent 1/2 is the same as the square root of the number 9 so therefore 8 exponent 1/3 is the same as the cube root of 8
8**(1/3) = ³√8 = 2*2*2 = 2
9**(1/2) = ²√9 = 3*3 = 3

I chose 9 because I can easily find the square root of 9

Answer 3

8**(1/3) equal ³√8==2 because 2³==8
but very important 125**(1/3) don't give 5.
u need use round (125**(1/3),7)