Find a Unit Vector in the Direction Opposite of U $\mathbf { u } = 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k }$

question 197

Multiple Choice

Find a unit vector in the direction opposite of u. $\mathbf { u } = 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k }$

• A) \(\frac { 98 \sqrt { 98 } } { 98 } ( 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k } )\)
• B) \(- \frac { \sqrt { 98 } } { 9 } ( 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k } )\)
• C) \(- \frac { \sqrt { 98 } } { 98 } ( 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k } )\)
• D) \(\frac { \sqrt { 98 } } { 98 } ( 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k } )\)
• E) \(- \frac { 98 \sqrt { 98 } } { 98 } ( 9 \mathbf { i } + 4 \mathbf { j } - \mathbf { k } )\)

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