Question

Determine a imagem da segunte domimio D={-7,-5,-3,0,2}F(x)=3x-8?

Answer 1

f(-7) = 3x(-7) -8 = -21-8 = -29
f(-5) = 3x(-5) -8 = -15-8 = -23
f(-3) = 3x(-3) -8 = -9-8 = -17
f(0) = 3x0 -8 = 0-8 = -8
f(2) = 3x2 -8 = 6-8 = -2

Im = {-29,-23,-9,-8,-2}