anonymous
  • anonymous
Evaluate the expression: v ⋅ w Given the vectors: r = <8, 1, -6>; v = <6, 7, -3>; w = <-7, 5, 2>
Precalculus
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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ganeshie8
  • ganeshie8
dot product
ganeshie8
  • ganeshie8
simply multiply the same components, and add them together v = <6, 7, -3>; w = <-7, 5, 2> v.w = 6(-7) + 7(5) + (-3)(2)
UsukiDoll
  • UsukiDoll
v = w= V dot W

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UsukiDoll
  • UsukiDoll
sdfjlsafj;j w =
anonymous
  • anonymous
wait im confuse
UsukiDoll
  • UsukiDoll
what I just typed is the standard format for a dot product. you had three terms in there and I accidentally typed 2 for the w... vectors have to be equal
UsukiDoll
  • UsukiDoll
your v was 6, 7, -3 right? v = so v1 = 6 v2 = 7 v3 = -3
UsukiDoll
  • UsukiDoll
w = <-7, 5, 2> w1 = -7 w2= 5 w3 = 2 since w =
anonymous
  • anonymous
@UsukiDoll I agree.
anonymous
  • anonymous
yes
UsukiDoll
  • UsukiDoll
so general dot product format will be u dot v or in your case v dot w = when I typed vnwn it's up to a number n
UsukiDoll
  • UsukiDoll
Therefore <6(-7)+7(5)+(-3)(2)>
UsukiDoll
  • UsukiDoll
<-42+35-6>
anonymous
  • anonymous
oh okayy! :)
anonymous
  • anonymous
do you further solve it?
UsukiDoll
  • UsukiDoll
I'm gonna try solve it without a calc.
anonymous
  • anonymous
i got 1
anonymous
  • anonymous
wait i mean -13
UsukiDoll
  • UsukiDoll
|dw:1378591826415:dw|
UsukiDoll
  • UsukiDoll
yeah you're right. the reason why I am solving without a calc is old skool professors don't believe in it. which imho sux

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