Find a Unit Vector in the Direction of the Given $\left[ \begin{array} { r } - 4 \\ 4 \\ - 2 \end{array} \right]$

question 23

Multiple Choice

Find a unit vector in the direction of the given vector.
- $\left[ \begin{array} { r } - 4 \\ 4 \\ - 2 \end{array} \right]$

• A)
• \(\left[ \begin{array} { r } - \frac { 2 } { 3 } \\ \frac { 2 } { 3 } \\ - \frac { 1 } { 3 } \end{array} \right]\)
• B)
• \(\left[ \begin{array} { l } \frac { 2 } { 3 } \\ \frac { 2 } { 3 } \\ \frac { 1 } { 3 } \end{array} \right]\)
• C)
• \(\left[\begin{array}{c}
• -\frac{2}{\sqrt{5}} \\
• \frac{2}{\sqrt{5}} \\
• -\frac{1}{\sqrt{5}}
• \end{array}\right]\)
• D)
• \(\left[\begin{array}{r}
• -\frac{2}{9} \\
• \frac{2}{9} \\
• -\frac{1}{9}
• \end{array}\right]\)

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