prove these formulas please:
http://assets.openstudy.com/updates/attachments/522d79b5e4b0fbf34d6355b1-wolfe8-1378719550881-capture.png

http://assets.openstudy.com/updates/attachments/522d79b5e4b0fbf34d6355b1-wolfe8-1378719688306-capture.png

(@wolfe8 thanks)

Question

prove these formulas please:
http://assets.openstudy.com/updates/attachments/522d79b5e4b0fbf34d6355b1-wolfe8-1378719550881-capture.png

http://assets.openstudy.com/updates/attachments/522d79b5e4b0fbf34d6355b1-wolfe8-1378719688306-capture.png

(@wolfe8 thanks)

wolfe8 · Answer

Proving is my weakness...but if you're wondering about the properties, I got them here: http://www.math.ubc.ca/~feldman/m226/vectorppties.pdf

anonymous · Answer

Thank you I was great,but I need the proof of these formulas...

wolfe8 · Answer

I'm guessing you'll have to show with examples?

anonymous · Answer

no,I think I don't need examples...I think these formulas can be proved without any examples.

anonymous · Answer

Thank you @wolfe8 fot that (PDF) I will prove this myself...I think I can :)