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Linear Algebra

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Dot Product: Basic Computation in R^3

LINALG-LKRSLX

Let $\boldsymbol{u} = \begin{bmatrix} 7\\\ 1\\\ -5\end{bmatrix}$ and $\boldsymbol{v} = \begin{bmatrix} 1\\\ -1\\\ 2\end{bmatrix}$.

Compute $\boldsymbol{u}\cdot\boldsymbol{v}$.

A

$0$

B

$3$

C

$2$

D

$-4$

E

$18$

F

$-3$