Calc III

  • #1

Homework Statement



Find a unit vector that is parallel to the vector from )5,1,-3) to (2,1,1)



Homework Equations





The Attempt at a Solution



I will appreciate any HINT for this problem b/c I am totaly confused from the why how the question is stated. Please help.
 

Answers and Replies

  • #2
623
0
First find a vector that goes between those 2 points
 
  • #3
147
0
Well, you know what the direction of the vector is, you just have to scale it correctly...
 
  • #4
Well, you know what the direction of the vector is, you just have to scale it correctly...

I don't think I get this that I have to scale it correctly...
 
  • #5
623
0
Well, you know what the direction of the vector is, you just have to scale it correctly...

I don't think I get this that I have to scale it correctly...

What's the difference between any old vector and unit vector?
 
  • #6
okay, I am following the textbook and nothings helps.

The points (5,1,-3) and (2,1,1) are the points of the vector V=<-3,0,4>

Then ||v||= 5
u= v/||v||= 1/5<-3,0,4>
Two nonzero vectors u avd v are parallel if there is some scalar c
such that
u=c.v

Am I even close with this solution? I am getting more confused.
 
  • #8
Thank you.
 

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