Answer:
[tex]v=\left[\begin{array}{ccc}1i\\0j\end{array}\right][/tex]
Step-by-step explanation:
We know that the given unit vector is in the direction of the x-axis.
Remember that an unit vector is a vector which magnitude is the unit, that's why is called like that.
So, the given unit vector can be written as [tex]v=1i+oj[/tex], where [tex]i[/tex] indicates the horziontal coordinate and [tex]j[/tex] indicates the vertical coordinate.
As a vertical or colum vector would be
[tex]v=\left[\begin{array}{ccc}1i\\0j\end{array}\right][/tex]
Therefore, the answer is
[tex]v=\left[\begin{array}{ccc}1i\\0j\end{array}\right][/tex]