\(\displaystyle A\)– множество простых чисел, меньших \(\displaystyle 13\small,\) \(\displaystyle B=\{1;\,3;\,5 \} \small.\)

Найдите  \(\displaystyle A \cup B\small.\)

• \(\displaystyle A \cup B=\{1;\,2;\,3;\,5;\,7;\,11 \}\small.\)
• \(\displaystyle A \cup B=\varnothing\)
• \(\displaystyle A \cup B=\{1;\,2;\,3;\,5;\,7;\,11;\,13 \}\small.\)
• \(\displaystyle A \cup B=\{2;\,7;\,11 \}\small.\)
• \(\displaystyle A \cap B=\{1;\,3;\,5 \}\small.\)