?

Linear Algebra

Free Version

Upgrade subject to access all content

Easy

Dot Product: Computation with Variable Coordinates

LINALG-3LX8BN

Find $x$ such that:

$$\begin{bmatrix} 1\\\ 1\\\ x\end{bmatrix} \cdot \begin{bmatrix} x\\\ 2\\\ -3\end{bmatrix} = 1$$

A

$-5$

B

$1$

C

$0$

D

$2$

E

$\dfrac{1}{2}$

F

$\dfrac{\sqrt{2}}{2}$