Question

va rog ex 3 imi trebuie urgent plizzz[

Answer 1

$\bold{a)} \ A=\{x|x \in \ N^*, x \leq 7 \} \\ \Rightarrow A=\{1,2,3,4,5,6,7 \}; \\ \bold{b)} \ B=\{x|x \in N,3\ \textless \ x \leq 8 \} \\ \Rightarrow B=\{4,5,6,7,8 \} \\ \bold{c)} \ A \cup B=\{1,2,3,4,5,6,7,8 \}; \\ \bold{d)} \ A \cap B= \{4,5,6,7 \}; \\ \bold{e)} \ B-A=\{3,3,3,3,3,7,8 \}.$

Answer 2

A) 1,2,3,4,5,6,7
B)4,5,6,7,8
C) 1,2,3,4,5,6,7,8
D) 4,5,6,7
E) 1,2,3
a fost prea simplu!!!!!