(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In a group, prove that (a^-1)^-1

2. Relevant equations

no equations required

3. The attempt at a solution

the inverse of a is 1/a and the inverse of 1/a is a. therefore , (a^-1)^-1 = a for all a.

Also for the property of an exponent, (a^n)^m=a^(m*n)

so , (a^-1)^-1=a^(-1*-1)=a,

There for (a^-1)^-1 = a for all a

Did I use the right methods for proving that (a^-1)^-1 =a?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Group question

**Physics Forums | Science Articles, Homework Help, Discussion**