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 Given u={4,2}, find uu\text { Given } \mathbf { u } = \{ - 4,2 \} \text {, find } \mathbf { u } \cdot \mathbf { u } \text {. }

Question 65

Multiple Choice

 Given u={4,2}, find uu\text { Given } \mathbf { u } = \{ - 4,2 \} \text {, find } \mathbf { u } \cdot \mathbf { u } \text {. }


A) (uv) v=15i+105j30k( \mathbf { u } \cdot \mathbf { v } ) \mathbf { v } = - 15 \mathbf { i } + 105 \mathbf { j } - 30 \mathbf { k }
B) (uv) v=30i15j+75k( \mathbf { u } \cdot \mathbf { v } ) \mathbf { v } = - 30 \mathbf { i } - 15 \mathbf { j } + 75 \mathbf { k }
C) (uv) v=5i35j+10k( \mathbf { u } \cdot \mathbf { v } ) \mathbf { v } = 5 \mathbf { i } - 35 \mathbf { j } + 10 \mathbf { k }
D) (uv) v=30i+15j75k( \mathbf { u } \cdot \mathbf { v } ) \mathbf { v } = 30 \mathbf { i } + 15 \mathbf { j } - 75 \mathbf { k }
E) (uv) v=15i105j+30k( \mathbf { u } \cdot \mathbf { v } ) \mathbf { v } = 15 \mathbf { i } - 105 \mathbf { j } + 30 \mathbf { k }

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