+0  
 
0
61
1
avatar

For each positive integer $n$, the set of integers $\{0,1,\ldots,n-1\}$ is known as the $\textit{residue system modulo}$ $n$. Within the residue system modulo $2^4$, let $A$ be the sum of all invertible integers modulo $2^4$ and let $B$ be the sum all of non-invertible integers modulo $2^4$. What is $A-B$?

 May 26, 2020
 #1
avatar+912 
+1

Please fix your LaTeX.

 May 26, 2020

12 Online Users

avatar
avatar