Posted by batmo on Thursday, August 30, 2012 at 4:20pm.
1.Find vectors v*w if vector v = 5 vector i – 4 vector j + 4 vector k and vector w = –6 vector i + 3 vector j – 2 vector k.
2.Find vectors v*w if vector v = 3 vector i – 4 vector j  8 vector k and vector w = 2 vector i + 6 vector j + 4 vector k.

calculus  eh?  Steve, Thursday, August 30, 2012 at 4:30pm
v*w has no meaning in common notation.
Do you mean v•w or v×w ?

Calculus  batmo, Thursday, August 30, 2012 at 5:13pm
v times w

Calculus  Steve, Thursday, August 30, 2012 at 5:24pm
i assume you mean crossproduct
I'll do #1:
vxw =
 i j k
5 4 4 
6 3 2
= 32i28j+26k
You can make things a lot more readable by just saying you're dealing with vectors. Then you can forget about all those words and just write the values, as in my answer.

Calculus  batmo, Thursday, August 30, 2012 at 6:23pm
no i don't mean cross product.
3– 4– 2
–14– 9– 4
5+ 3– 4
–4– 14– 9
these are the possible answers. all with IJK following of course.

Calculus  Steve, Friday, August 31, 2012 at 5:10am
In that case, say dot product.
5i4j+4k • 5i+3j2k = 25128 = 45
you say you don't mean cross product, but you give vectors for answers.
dot product of two vectors is just a number.
I'm afraid I don't know what operation you are using.
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