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a fost răspuns

f:R→R,f(x)=2x-4 Verificati daca f(2)+f(4)/2=f(2+4/2)

Răspuns :

f(x)= 2*x-4,
f(2)= 2*2-4=0
f(4)/2 = (2*4-4)/2= 4/2 = 2
f((2+4)/2)= f(3) = 2*3-4= 2
0+2=2 , deci e adevarat: f(2)+f(4)/2= f((2+4)/2)

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