?Find a Unit Vector in the Direction Of $\mathbf { u } = 4 \mathbf { i } - 2 \mathbf { j }$

question 28

Multiple Choice

?Find a unit vector in the direction of $\mathbf { u } = 4 \mathbf { i } - 2 \mathbf { j }$ . ?

• A)? \(\left\langle - \frac { 2 \sqrt { 5 } } { 5 } , \frac { \sqrt { 5 } } { 5 } \right\rangle\)
• B)? \(\left\langle \frac { 4 \sqrt { 5 } } { 5 } , - \frac { 2 \sqrt { 5 } } { 5 } \right\rangle\)
• C)? \(\left\langle \frac { 8 \sqrt { 5 } } { 5 } , - \frac { 4 \sqrt { 5 } } { 5 } \right\rangle\)
• D)? \(\left\langle \frac { 2 \sqrt { 5 } } { 5 } , - \frac { 2 \sqrt { 5 } } { 5 } \right\rangle\)
• E)? \(\left\langle \frac { 2 \sqrt { 5 } } { 5 } , - \frac { \sqrt { 5 } } { 5 } \right\rangle\)

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