Answer
$$5$$
Work Step by Step
First, perform the computation in $\mathbb{Z}$:
$$8(6+4+3)=8(13)=104$$
To convert to $\mathbb{Z}_9$, divide $104$ by $9$, to find the remainder of $5$.
Linear Algebra: A Modern Introduction
by Poole, David
Published by
Cengage Learning
ISBN 10:
1285463242
ISBN 13:
978-1-28546-324-7
Chapter 1 - Vectors - 1.1 The Geometry and Algebra of Vectors - Exercises 1.1 - Page 17: 39
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