$\textit{Câu 1:}$$\\$
$\textit{a,d,e: đúng}$$\\$
$\textit{c) x $\in$ Q : $x^{2}$ +1 $\ne$ 5x}$$\\$
$\textit{f)2017 $\not\vdots$ 4}$$\\$
$\textit{Câu2:}$$\\$
$\textit{a) A $\cap$ B $\in$ $\emptyset$}$$\\$
$\textit{A $\cup$ C= ( -2; 0;1;3; 7; 9)}$$\\$
$\textit{cho mình 5 sao + cảm ơn + ctlhn}$$\\$
$\textit{chúc bạn học tốt-.- nha!!!!!!!}$$\\$
$\textit{@Lộc♡♡♡}$