Jawaban:

1.Fungsi ff dari himpunan A ke himpunan B dirumuskan :

f : x → x² + 1 , dengan domain = {x | -3 ≤ x <4 , x∈ bilangan bulat}

2.Contoh :

Df = {x | -3 ≥ x <4 ; x∈ bilangan bulat}

= {-3, -2, -1, 0, 1, 2, 3}

f : x → x² + 1

-3 → (-3)² + 1 = 9 + 1 = 10

-2 → (-2)² + 1 = 4 + 1 = 5

-1 → (-1)² + 1 = 1 + 1 = 2

0 → (0)² + 1 = 0 + 1 = 1

1 → (1)² + 1 = 1 + 1 = 2

2 → (2)² + 1 = 4 + 1 = 5

3 → (3)² + 1 = 9 + 1 = 10

Rf = {1, 2, 5, 10}

Jika A = {-3, -2, -1, 0, 1, 2, 3}

B = {0, 1, 2, 3, 4, 5, 6, 7, 8 9, 10}