Find the Unit Vector Having the Same Direction as V $$\mathbf { v } = - 3 \mathbf { i } + \mathbf { j }$$

Find the unit vector having the same direction as v.
- $$\mathbf { v } = - 3 \mathbf { i } + \mathbf { j }$$

A) $\mathbf { u } = - \frac { 3 \sqrt { 10 } } { 10 } \mathbf { i } - \frac { \sqrt { 10 } } { 10 } \mathbf { j }$
B) $\mathbf { u } = - \frac { \sqrt { 10 } } { 3 } \mathbf { i } + \sqrt { 10 } \mathbf { j }$
C) $\mathbf { u } = - 3 \sqrt { 10 } \mathbf { i } + \sqrt { 10 } \mathbf { j }$
D) $\mathbf { u } = - \frac { 3 \sqrt { 10 } } { 10 } \mathbf { i } + \frac { \sqrt { 10 } } { 10 } \mathbf { j }$

Correct Answer:

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