Część:
Project ID:
1003055713
Accepted:
1
Clonable:
0
Easy:
1
Zaznacz poprawne działanie:
\( \{d\}\cup \{d\}\cup \{d\} = \{d\} \)
\( \{d\}\cup \{d\}\cup \{d\} = \{ddd\} \)
\( \{d\}\cup \{d\}\cup \{d\} = \{d;d\} \)
\( \{d\}\cup \{d\}\cup \{d\} = \{d;d;d\} \)