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Given u=3i2j\mathbf { u } = - 3 \mathbf { i } - 2 \mathbf { j }

Question 118

Multiple Choice

Given u=3i2j\mathbf { u } = - 3 \mathbf { i } - 2 \mathbf { j } and v=i5j\mathbf { v } = - \mathbf { i } - 5 \mathbf { j } , determine 9u+6v- 9 \mathbf { u } + 6 \mathbf { v } .


A) 9u+6v=21i12j- 9 \mathbf { u } + 6 \mathbf { v } = 21 \mathbf { i } - 12 \mathbf { j }
B) 9u+6v=27i21j- 9 \mathbf { u } + 6 \mathbf { v } = 27 \mathbf { i } - 21 \mathbf { j }
C) 9u+6v=9i3j- 9 \mathbf { u } + 6 \mathbf { v } = - 9 \mathbf { i } - 3 \mathbf { j }
D) 9u+6v=12i3j- 9 \mathbf { u } + 6 \mathbf { v } = 12 \mathbf { i } - 3 \mathbf { j }
E) 9u+6v=3i+3j- 9 \mathbf { u } + 6 \mathbf { v } = - 3 \mathbf { i } + 3 \mathbf { j }

Correct Answer:

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