Find ||2w-v|| from <v,w>=-3, ||v||=2, ||w||=7

  • Thread starter DavidLiew
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  • #1

DavidLiew

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How to find a ||2w-v||,by giving <v,w> = -3, ||v||=2 and ||w||= 7.

Actually I find that it was undefined, I not sure its correct or not, so I need yours to help me thanks.:shy:
 
  • #2
Finally I find it is equal to [tex]\sqrt{212}[/tex]. Am I right?
 
  • #3
DavidLiew said:
Finally I find it is equal to [tex]\sqrt{212}[/tex]. Am I right?

I got the same answer.
 

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