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Ajutoor...va rog.Plss

Ajutoorva RogPlss class=

Răspuns :

fie a-b=c
atunci b-a=-(a-b)=-c
si
c^2013+(-c)^2013= c^2013-c^2013**** =0
raspuns corect A
as simple as that!!!!!



****
 (-c)^2013= [(-1) *(c)]^2013= (-1)^2013*c^2013=-1*c^2013=-c^2013
Vezi imaginea ALBATRAN