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# Fraction Indices

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1. Find the value of n

1) 1/8 = 8^n

2) (√7)^5 = 7^n

3) 125^-2/3 x (1/5)^2

Need help on these questions
2. Some rules you should learn:

a^(-n) = 1/a^n this is Q1
a^(m/n) = nth root a^m

1) 8^-1
2) 7^4 you square root it, then you square it to get the original then to the power 4
3) 125^-2/3 = 1/125^2/3 = 1/(cuberoot)125^2
x 1/10

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Updated: April 3, 2016
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