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The Value of a That Makes v=3i−4j+ak\mathbf { v } = 3 \mathbf { i } - 4 \mathbf { j } + a \mathbf { k }

Question 120

Multiple Choice

The value of a that makes v=3i−4j+ak\mathbf { v } = 3 \mathbf { i } - 4 \mathbf { j } + a \mathbf { k } and w=2i−j+5k\mathbf { w } = 2 \mathbf { i } - \mathbf { j } + 5 \mathbf { k } orthogonal is


A) 2
B) 5
C) 6
D) -2
E) -6

Correct Answer:

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