Sun June 01, 2008 By:

This question is from the number systems

Expert Reply
Fri July 25, 2008
Let us take a = 2n+3   b=2n+1
a+b=4n+4   (a+b)/2=2n+2   as 2n is always even and even integer plus 2 is always even, so (a+b)/2 is always even.
Now a-b=2 and (a-b)/2=2/2=1 ,so this is odd.
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