Question

Help with Vectors

Answer 1

If v = <0, 2> ; w = <4, 2> , then the projection of v onto w is:

Answer 2

\[\frac{ 4 }{ ||w||^2 }(w)\]

Answer 3

yes that looks good

Answer 4

\[\frac{ 4 }{ ||2\sqrt5||^2 }(4,2)\]

Answer 5

so for the denominator, would it be 4*5? because ^2 cancels out the square root

Answer 6

Yes

Answer 7

so 4/20(w)=(4/5,2/5)?

Answer 8

\[(\sqrt{2\sqrt{5}}))^2 = 2\sqrt{5}\]

Answer 9

Im confused

Answer 10

\[|| 2\sqrt{5}||^2 \implies (\sqrt{2\sqrt{5}}))^2 = 2\sqrt{5}\] or am I just being dumb here

Answer 11

http://www.wolframalpha.com/input/?i=%7C%7C2sqrt5%7C%7C%5E2

Answer 12

because the 2 is separate from the sqrt, it is like multiply it by 2 and then sqrt5^2=5

Answer 13

so 4*5

Answer 14

Oh I forgot to square again xD

Answer 15

Nice :)

Answer 16

Thank you :> Thanks for the confirmation though guys. vectors are fun

Answer 17

You're doing good :)

Answer 18

thank you :p