Question

if vector u = 3i-2j and vector v= -2i+3j find Ⅱ u-2v Ⅱ ...is the first step correct? click attached http://bamboodock.wacom.com/doodler/1717741b-883c-4d7c-9628-7d88d1379114

Answer 1

you better do it step by step to avoid confusions.

Answer 2

okay what is my first step..here? ><

Answer 3

solve for u and v first then do the |u-2v|

Answer 4

how....?

Answer 5

oh solve them first and then put in "ll ll"

Answer 6

yep!

Answer 7

thank you!

Answer 8

so i got u-2v = 7i-8j correct?

Answer 9

First compute u-2v:\[(\vec{u}-2\vec{v})=<3-2(-2),-2-2(3)>=<7,-8>\]Now, find the length of this vector...

Answer 10

you mean the magnitude?

Answer 11

same thing

Answer 12

so it looks like this right? √(7)^2+(-8)^2?

Answer 13

i got it thank you so much!!!!!
both to @eseidl and @hbaldon