Chapter 5.2, Problem 20E

Find the multiplicative inverse of the given element. (See example 4 of Section 2.6.)

a $\left[11\right]$ in ${\mathbb{Z}}_{317}$.

$\left[11\right]$ in ${\mathbb{Z}}_{138}$.

$\left[9\right]$ in ${\mathbb{Z}}_{242}$.

$\left[6\right]$ in ${\mathbb{Z}}_{319}$

[Type here][Type here]