Question

Evaluate 27 with and exponent of -5/3

Answer 1

`x^(-m)=(1)/(x^m)`
and

`(x^m)^n=x^(mn)`
so

`27^(-5)/(3)=(3^3)^(-5)/(3)=3^(-15)/(3)=3^(-5)=`
`(1)/(3^5)=(1)/(243)`