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liubo4ka [24]
2 years ago
9

Determine the value of a so that A = 2i+aj+k and B = 4i-2j-2k are perpendicular​

Mathematics
1 answer:
Digiron [165]2 years ago
7 0
In order to make them perpendicular, their dot product must result in zero. so:

4 \times 2 - 2a - 2 \times 1 = 0

2a = 8 - 2 = 6

a = 3
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