Răspuns:
Explicație pas cu pas:
2x -1 <= 15, 2x <= 16, x <= 8
A = {0; 1; 2; 3; 4; 5; 6; 7; 8}
3 < x-1 <= 13, 4 < x <= 14, 2 < x <= 7
B = {3; 4; 5; 6; 7}
AUB = A
B⊂A si nu invers !
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Răspuns:
Explicație pas cu pas:
2x -1 <= 15, 2x <= 16, x <= 8
A = {0; 1; 2; 3; 4; 5; 6; 7; 8}
3 < x-1 <= 13, 4 < x <= 14, 2 < x <= 7
B = {3; 4; 5; 6; 7}
AUB = A
B⊂A si nu invers !