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calculati f(1) ,f(3),f(5) ,daca: f:N->Z , F(x)=4-x

Răspuns :

F(1)=4-1=3
F(3)=4-3=1
F(5)=4-5= -1
f(1)=4-1=3
f(3)=4-3=1
f(5)=4-5=-1