Question

Se considera functia f: {-1,0,1,2}
--> R, f(x)=2x-1
Calculati f(-1) - f(0)
Calculati f(1) inmultit f(2)
Determinati multimea valorilor functiei (Im f)
Aflati Im f interesectat cu N.

Answer 1

f(-1)=2x(-1)-1
f(-1)=-2-1
f(-1)=-3

f(0)= 2x0-1
f(0)=-1
=> f(-1)-f(0)= -3-1=-4

Calculati f(1) inmultit cu f(2)
F(1)=2x1-1
f(1)=2-1
f(1)=1

f(2)=2x2-1
f(2)=4-1
f(2)=3       => f(1)xf(2) =1x3=3

Im f=graficul=sistemul xoy
sper ca te-am ajutat