Linear Algebra: A Modern Introduction

Published by Cengage Learning
ISBN 10: 1285463242
ISBN 13: 978-1-28546-324-7

Chapter 1 - Vectors - 1.2 Length and Angle: The Dot Product - Exercises 1.2: 1

Answer

-1

Work Step by Step

We know that the dot product of $u$ and $v$ is defined as $u.v=u1v1+u2v2$. We have $u=[-1, 2]$ and $v=[3, 1]$. So $u.v=(-1*3)+(2*1)=(-3+2)=-1$
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