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Stiind ca i=2 si u=4 calculati i+i= i+i+i= i+i-u= u-i= u+u-i=

Răspuns :

i+i=>2+2=4
i+i+i=>2+2+2=4
i+i-u=>2+2-4=>4-4=0
u-i=>4-2=2
u+u-i=4+4-2=>8-2=6