Question

Quais são os elementos do conjunto descrito a seguir?
A= {n € N ; 5 < n < 10}

a) A= {6,7,8,9,10}
b) A= {6,7,8,9}
c) A= {5,6,7,8,9,10}
d) A= {5,6,7,8,9}

Answer 1

$A=\{n\in N/ ~5\ \textless \ n\ \textless \ 10\} \\ \\ A=\{6,7,8,9\}~~\mapsto~~Letra~~B \\ \\ quando~~ o ~~sinal~~ \'e ~\ \textless \ ~~indica~~que~~o~~5~~e~~10~~n\tilde{a}o~~faz~~parte$