Question

v ⋅ w

Given the vectors:

r = <8, 8, -6>; v = <3, -8, -3>; w = <-4, -2, -6>

Answer 1

dot product is easy,
let v= (a, b, c)
and
let u = (m, n, o)

v ⋅ u = am + bn + co = some number

Answer 2

So I don't use R at all?

Answer 3

v = <3, -8, -3>; w = <-4, -2, -6>

am + bn + co
3*-4 + -8*-2 + -3*-6 = 22

Answer 4

It isn't in the question so why would you use it

Answer 5

So the answer is 22?

Answer 6

http://www.wolframalpha.com/input/?i=+%3C3%2C+-8%2C+-3%3E+dot++%3C-4%2C+-2%2C+-6%3E

Answer 7

yes

Answer 8

Thank you.

Answer 9

YOU CAN USE WOLFRAM ALPHA?

Answer 10

no problem any other vector problems?

Answer 11

I mean it does it for you?

Answer 12

yes you can use wolframalpha for most everything

Answer 13

Wow.

Answer 14

it is really useful for calculus

Answer 15

not that amazing I mean the dot product is pretty simple

Answer 16

Oh wait can I ask one more, I got this wrong.

Find a*b

a = <5,2>, b = <4,5>

I put 20,10 and I got it wrong

Answer 17

is this a dot b? or is this a * b

Answer 18

a * b

Answer 19

A) <20, 10>
B) <9, 7>
C) -10
D) 30

Answer 20

Well the dot product is vector multiplication