3d vectors

lolita20

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Apr 30, 2021
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7
please help with this


We have two vectors u = [5,5,5] and v = [-1,3,-1] ,
1- Compute the cross product u×v. Write the answer as [a,b,c].
2- Compute the cross product v×u. Write the answer as [a,b,c].
3- Compute the area of the parallellogram spanned by u and v
 

Dr.Peterson

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Nov 12, 2017
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11,507
please help with this


We have two vectors u = [5,5,5] and v = [-1,3,-1] ,
1- Compute the cross product u×v. Write the answer as [a,b,c].
2- Compute the cross product v×u. Write the answer as [a,b,c].
3- Compute the area of the parallellogram spanned by u and v
Please follow our guidelines, so we can see where you need help:


Presumably you have been taught what a cross product is, so you can at least make an attempt.
 

lolita20

New member
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Apr 30, 2021
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7
I ve learnt and I solved this question but im not completey sure it is correct , here is the answer :)
 

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Dr.Peterson

Elite Member
Joined
Nov 12, 2017
Messages
11,507
I ve learnt and I solved this question but im not completey sure it is correct , here is the answer :)
Your v is different than what you said before. Which is correct?

Where are you unsure of your work?
 

pka

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Joined
Jan 29, 2005
Messages
11,003
We have two vectors u = [5,5,5] and v = [-1,3,-1] ,
1- Compute the cross product u×v. Write the answer as [a,b,c].
2- Compute the cross product v×u. Write the answer as [a,b,c].
3- Compute the area of the parallellogram spanned by u and v
Here is a web resource. you can use it to check your work.
 
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