[tex]zad.a\\\\\{1,3,5,7 \} \cup \{ 0,1 ,2 ,7\} = \{ 0, 1 ,2 ,3, 5 ,7 \}\\\\zad.b\\\\\{ a, b, c, d \} \setminus \{b, c, d, e, \}= \{ a \}\\\\zad.c\\\\\{ 3, 7, 12, 8, 15 \} \cap \{ 10, 15, 7 , 8 , 12 \}= \{7, 8, 12, 15 \}\\\\zad.d\\\\\{ a, t, l \} \cup \{ a, d, t \} = \{ a, d , l , t \}\\\\\{ a, k , t, c, d, l \} \setminus \{ c, k \} = \{ a, d, l, t \} ~~ czyli\\\\\{ a, t, l \} \cup \{ a, d, t \} = \{ a, k , t, c, d, l \} \setminus \{ c, k \}\\\\~~~~~~~~~~~~\{ a, d, l, t \} =\{ a, d, l, t \}[/tex]
