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2014-05-22T21:40:08+03:00
F( -2011/2)=2*  -2011/2 -1=  -2011-1=-2012
f(-2009/2)=2 * -2009/2 -1= -2009-1= -2010
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f(2013/2)= 2 * 2013/2 -1= 2013-1= 2012

(2011+2013)/2=4024/2=2012functii
S=(-2012+2012)*2012/2=  (-2012+2012)*1006= 0*1006=0
2 3 2