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exercitiul 4 ? 11 pct

Exercitiul 4 11 Pct class=

Răspuns :

f:R—>R, f(x)= 2x+1
f(-2)=2×(-2)+1=-4+1=-3
f(-1)=2×(-1)+1=-2+1=-1
f(0)=2×0+1=1
f(1)=2×1+1=3
f(-2)+f(-1)+f(0)+f(1)
(-3)+(-1)+1+3
-4+1+3=0