Untuk fungsi f (x) = 2x+5,dengan daerag asal A = (-2,-1,0,1,2),bayangan setiap anggota A adalah?

Kelas 8 Matematika
Bab Fungsi

f(x) = 2x + 5

f(-2) = 2 . (-2) + 5
f(-2) = -4 + 5
f(-2) = 1

f(-1) = 2 . (-1) + 5
f(-1) = -2 + 5
f(-1) = 3

f(0) = 2 . 0 + 5
f(0) = 0 + 5
f(0) = 5

f(1) = 2 . 1 + 5
f(1) = 2 + 5
f(1) = 7

f(2) = 2 . 2 + 5
f(2) = 4 + 5
f(2) = 9

Bayangannya = { 1, 3, 5, 7, 9 }