f(-2)=2-(-2)=>f(-2)=2+2=>f(-2)=4
f(-1)=2-(-1)=>f(-1)=2+1=>f(-1)=3
f(0)=2-0=>f(0)=2
f(1)=2-1=>f(1)=1
f(2)=2-2=>f(2)=0
Sper ca te-am ajutat.
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