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 $u.v=(-1*3)+(2*1)=(-3+2)=-1$
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 - 1.2 Length and Angle: The Dot Product - Exercises 1.2 - Page 290: 1
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