Find a Unit Vector in the Direction of U $\mathbf { u } = - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k }$

question 253

Multiple Choice

Find a unit vector in the direction of u. $\mathbf { u } = - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k }$

• A) \(\frac { u } { \| \mathbf { u } \| } =\) \(\frac { \sqrt { 270 } } { 270 } ( - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k } )\)
• B) \(\frac { u } { \| \mathbf { u } \| } =\) \(- \frac { \sqrt { 270 } } { 270 } ( - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k } )\)
• C) \(\frac { u } { \| \mathbf { u } \| } =\) \(\frac { 270 } { \sqrt { 270 } } ( - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k } )\)
• D) \(\frac { u } { \| \mathbf { u } \| } =\) \(\frac { 270 } { 270 } ( - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k } )\)
• E) \(\frac { u } { \| \mathbf { u } \| } =\) \(- \frac { 270 } { 270 } ( - 5 \mathbf { i } + 7 \mathbf { j } + 14 \mathbf { k } )\)

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