Question

need help please.

Given u,v, and w are all perpendicular to each other

Given two vectors u and v such that u x v = uv, explain what you know about the two vectors

Answer 1

if you have two vectors u and v and you want to show they are perpendicular, you just need to show that

u dot v = 0

Answer 2

u dot v is the dot product of vector u and vector v

Answer 3

attached is the question

Answer 4

I know. Do you know how to take the dot product of two vectors?

Answer 5

meaning u dot v=(1,3,-2)+(-2,2,2)?

Answer 6

not quite

Answer 7

you multiply the corresponding components first

then after multiplying, you add up the products

Answer 8

u X v=(3)(2)-(2)(-2),(-2)(-2)-(2)(1),(1)(2)-(-2)(3)
=((6)-(-4),(4)-(2),(2)-(-6)
=(10,2,8)
like this?