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

Prove that the following sets form infinite groups with respect to ordinary multiplication.

a){2^k} where k E Z

b){(1+2m)/(1+2n)} where m,n E Z

2. Relevant equations

3. The attempt at a solution

I sort of know about

closure

associativity

identity

inverses

...and i know that multiplication is somewhere but what do i multiply? - apart form that im pretty stuck.

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# Homework Help: Algebra - Groups

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