Question

f (×)=7×-2
D={-3,-2,-1,0,1,2,3,4}

Answer 1

F (×)=7×-2
D={-3,-2,-1,0,1,2,3,4}

F(x) = 7x - 2
x= - 3
F(-3)= 7.(-3) - 2
F(-3) = - 21 - 2
F(-3)= - 23

F(x)= 7x-2
x= -2
F(-2)= 7.(-2) - 2
F(-2)= - 14 - 2
F(-2)= - 16

F(x)= 7x-2
x = - 1
F(-1)= 7.(-1) - 2
F(-1)= - 7 - 2
F(-1)= - 9

F(x)= 7x-2
x= 0
F(0)= 7.0 - 2
F(0) = - 2

F(x)= 7x - 2
x=1
F(1) = 7.1 - 2
F(1)= 7-2
F(1) = 5

F(x)= 7x-2
x=2
F(2) = 7.2 - 2
F(2) = 14 - 2
F(2) = 12

F(x)= 7x-2
x=3
F(3)= 7.3 - 2
F(3) = 21 - 2
F(3) = 19

F(x)= 7x-2
x= 4
F(4)= 7.4 - 2
F(4)= 28-2
F(4)= 26

R.:
Conjunto Imagem:

I : { -23, - 16, - 9, - 2, 5, 12,19, 26}