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October 24th, 2016, 11:15 PM  #1 
Newbie Joined: Oct 2016 From: UGANDA Posts: 1 Thanks: 0  Proofs
How can l prove that (a,b)=2(a/2,b/2) if a and b are positive integers

October 25th, 2016, 01:48 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,732 Thanks: 689 
It seems to follow from the definition of scalar multiplication of a vector.

October 25th, 2016, 04:21 PM  #3 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,138 Thanks: 872 Math Focus: Wibbly wobbly timeywimey stuff.  

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