negative root

For example if you need to calculate 127^(-1/9) on calculator then follow these steps on calculator:

1) On
2) Enter 125
3) Square root 12 times
4) Less 1
5) Divide the figure on screen by 9
6) Add 1
7) Press Multiply & then equal to, 12 times
8) Press Divide then equal to

You got the accurate answer, for cross checking type 127^(-1/9) in excel or in Google, you can use above formula to find out any number with power

P.S: Don't use step-8 if power is not in negative

In Step-2, enter 127 instead of 125, it's typing error