Question

giúp em với ạ

Answer 1

11B

A={0;2;3;5}

B={2;7}

=>\(A\cap B=\left\{2\right\}\)

10

\(X=\left\{1;2;4;7;9\right\};Y=\left\{-1;0;7;10\right\}\)

=>\(X\cup Y=\left\{1;2;4;7;9;-1;0;10\right\}\)

=>Chọn C

9:

\(A=\left\{a;b;c\right\};B=\left\{a;c;d;e\right\}\)

=>\(A\cap B=\left\{a;c\right\}\)

=>Chọn A

8C

7B nha bạn