Question

va rog am nevoie urgent! ​

Answer 1

Răspuns:

Explicație pas cu pas:

Ix - 4I ≤ 3

-3 ≤ x - 4 ≤ 3

1 ≤ x ≤ 7

A = [1, 7] interval inchis in 1 si 7

__________

1 < (3x + 8)/2 < 13

2 < 3x + 8 < 26

-6 < 3x < 18

-2 < x < 6

B = (-2, 6) interval deschis in -2 si 6

_____________

A U B = (-2, 7]

A U B ∩ Z = {-1, 0, 1, 2, 3, 4, 5, 6, 7}