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Paha777 [63]
3 years ago
9

For what values of a are v = a i − j + k and w = a i + a j − 3 k perpendicular? give exact values.

Mathematics
1 answer:
nevsk [136]3 years ago
3 0
The vectors are perpendicular when their dot product is zero. That is
.. a^2 -a -3 = 0
.. (a -1/2)^2 -13/4 = 0
.. a = (1 ±√13)/2
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Vsevolod [243]

The only rule to follow is

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Here is a sample

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Probability The average time between incoming calls at a switchboard is 3 minutes.if a call has just come in,the probability tha
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Answer:

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Step-by-step explanation:

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According to this model,

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c) the probability that a call in comes within 5 minutes is  p(t) = 1 -e ^{-5/3} =0.8111

6 0
3 years ago
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LenKa [72]

Answer:

C

Step-by-step explanation:

Educated guess

3 0
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