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September 7th, 2013, 12:20 PM  #1 
Senior Member Joined: Jul 2013 From: United Kingdom Posts: 471 Thanks: 40  3d vector question
If V were to be (3/2, 3/2, 6) and Q were to be (8, 15, 20), what would be the distance from V to Q or vice versa (in units)? 
September 7th, 2013, 12:43 PM  #2 
Senior Member Joined: Sep 2012 From: British Columbia, Canada Posts: 764 Thanks: 53  Re: 3d vector question
Are you familiar with the distance formula? In three dimensions, this is where a=(a1,a2,a3) and b=(b1,b2,b3) are the two points. 
September 7th, 2013, 02:27 PM  #3 
Senior Member Joined: Jul 2013 From: United Kingdom Posts: 471 Thanks: 40  Re: 3d vector question
Yes I am familiar with it, but I'd like to have an answer, as my textbook may be wrong. It put 21.9 down as an answer, which sounds ridiculous. 
September 7th, 2013, 02:46 PM  #4 
Senior Member Joined: Sep 2012 From: British Columbia, Canada Posts: 764 Thanks: 53  Re: 3d vector question
It's approximately 30. Greater than though.

September 8th, 2013, 02:49 AM  #5  
Global Moderator Joined: Dec 2006 Posts: 20,978 Thanks: 2229  Quote:
 

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