Răspuns :
[tex]f:\mathbb{R}\rightarrow \mathbb{R},[/tex]
[tex]f(x) = |x^2-4|+4 \\ \\ |x^2-4| \geq 0\Big|+4 \Rightarrow |x^2-4|+4\geq 4 \Rightarrow f(x) \geq 4 \\ \\ \Rightarrow\boxed{Imf = [4,+\infty)}[/tex]
[tex]f:\mathbb{R}\rightarrow \mathbb{R},[/tex]
[tex]f(x) = |x^2-4|+4 \\ \\ |x^2-4| \geq 0\Big|+4 \Rightarrow |x^2-4|+4\geq 4 \Rightarrow f(x) \geq 4 \\ \\ \Rightarrow\boxed{Imf = [4,+\infty)}[/tex]