Explicație pas cu pas:
a) f(-0,5)= 2·(-0,5)-1= -1-1= -2
f(0,5)= 2·0,5-1= 1-1= 0
f(1)= 2·1-1= 2-1=1
f(2)= 2·2-1= 4-1= 3
f(3)= 2·3-1= 6-1= 5
f(4)= 2·4-1= 8-1= 7
b) g(-3)= -2·(-3)-1= 6-1= 5
g(-2)= -2·(-2)-1= 4-1= 3
g(-1)= -2·(-1)-1= 2-1= 1
g(0)= -2·0-1= 0-1= -1
g(1,5)= -2·(1,5)-1= -3-1= -4
g(3)= -2·3-1= -6-1= -7