Question

Giúp e với ạ

Answer 1

Bài 14: A={0;2;4;6;8}; B={1;2;3;4;5;6}

=>A\(\cap\) B={0;2;4;6;8}\(\cap\) {1;2;3;4;5;6}

={2;4;6}

X⊂A; X⊂B

Do đó: X⊂(A\(\cap\) B)

=>X={2}; X={4}; X={6}; X=∅; X={2;4}; X={2;6}; X={4;6}; X={2;4;6}

Bài 8:

A={x∈R:-12<=x<8 và -6<=x<=9}

=>A=[-6;8)

B={x∈R:-9<x<=3 hoặc 2<x<=8}

=>B=(-9;3]\(\cup\) (2;8]

=(-9;8]

C={x∈R:-6<x<=-1 hoặc 2<=x<8}

=>C=(-6;-1]\(\cup\) [2;8]

A\(\cap\) B=[-6;8)\(\cap\) (-9;8]

=[-6;8)

A\(\cup\) B=[-6;8)\(\cup\) (-9;8]

=(-9;8]

A\B=[-6;8)\(-9;8]

=∅

B\A=(-9;8]\[-6;8)

=(-9;-6)\(\cup\) {8}

A\(\cap C\) =[-6;8)\(\cap\) ((-6;-1]\(\cup\) [2;8])

=(-6;-1]\(\cup\) [2;8)

A\(\cup\) C=[-6;8)\(\cup\) ((-6;-1]\(\cup\) [2;8])

=[-6;8]

A\C=[-6;8)\((-6;-1]\(\cup\) [2;8])

={-6}

C\A=((-6;-1]\(\cup\) [2;8])\[-6;8)

=(-1;2)