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

question 20

Multiple Choice

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) \(\mathbf { u } = - \frac { 3 \sqrt { 10 } } { 10 } \mathbf { i } + \frac { \sqrt { 10 } } { 10 } \mathbf { j }\)

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