Question

:A={x € N | x <5} si B ={x€N |3 _< x_<6} :AUB,A U inve

Answer 1

A{0,1,2,3,4}
B{4,5}   U invers inseamna intersectat
A U (inve) B={4}

Answer 2

  [tex]B=\{x\in{N} \,/\, 3\le{x}\le6\} \;\;\rightarrow\;\;B=\{3;4;5;6\}\\ A=\{x\in{N}\;/\;x\,\ \textless \ \,5\}\;\;\;\;\;\;\;\rightarrow\;\;A=\{0;1;2;3;4\}\\ \\ A\,U\,B=\{0;1;2;3;4;5;6\}\\ A\cap{B}=\{3;4\} [/tex]