Question

calculati f(-2)+f(2),unde f:R-R,f(x)=x^2-4

Answer 1

f(-2)=(-2)²-4=4-4=0
f(2)=2²-4=0   le   adui
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f(-2)+f(2)=0+0=0

Answer 2

[tex]f(-2)=(-2)^2-4= 4-4=0 [/tex] (1)

$f(2)= 2^2-4=4-4=0$ (2)

Din (1) si (2) ⇒ $f(-2)+f(2)= 0+0=0$