Question

Fie A = {0, ± 1, ±2, ±3}, B = {0, 1, 2, 3, 4}, f: A->B, f(x) = |x|+1.​

Answer 1

Răspuns:

Explicație pas cu pas:

A = {0, ± 1, ±2, ±3}, B = {0, 1, 2, 3, 4}, f: A->B,

f(x) = |x|+1

f(0) = I 0 I + 1 = 0+1 = 1

f(1) = I 1 I + 1 = 2

f(-1) = I -1 I + 1 = 2

f(2) = I 2 I + 1 = 3

f(-2) = I-2 I +1 = 3

f(3) = I 3 I +1 = 4

f(-3) = I -3 I + 1 = 4  =>

f : A --> {1 ; 2 ; 3 ; 4}