Question

daca AUB={2, 5, 6, 9 12} AnB= 5, 6, 12} A/B={2} atunci multimea B are ... elemente​

Answer 1

Răspuns:

are 3 elemente

Answer 2

Răspuns:

4

Explicație pas cu pas:

AUB = {2, 5, 6, 9, 12}

A∩B = {5, 6, 12}

A/B = {2}

=>

A = {2, 5, 6, 12}

B = {5, 6, 9, 12}

=>

card(B) = 4