Question

toate ex va roggg dau coroana si 50 puncte​

Answer 1

Răspuns:

8.

a)a=7

b)a=14

c)a=12

9.

A={1, 2, 3, 4, 5}

B={3, 4, 5, 6, 7, 8, 9}

a){1, 2, ..., 9}

b){3, 4, 5}

c){1, 2}

d){6, 7, 8, 9}

e)A

f)Mulțimea vida

g)A

h)Mulțimea vida

10.

A={3, 4, 5, 6, 7, 8}

B={0, 2, 4, 6, 8, 10}

C={2, 3, 4, 5, 6, 7}

D={1, 2, 4, 8}

AnC={3, 4, 5, 6, 7}

DUB={0, 1, 2, 4, 6, 8, 10}

C\D={3, 5, 6, 7}

B\D={0, 6, 10}

AnB={4, 6, 8}

BUC={0, 2, 3, 4, 5, 6, 7, 8, 10}

(A\B)n(B\C)={3, 5, 7}n{0, 8, 10}=mulțimea vida

(CnD)\(B\C)={2, 4}\{0, 8, 10}={2, 4}

(AUB)n(BnC)={0, 2, 3, 4, 5, 6, 7, 8, 10}n{2, 4, 6}={2, 4, 6}

D\(CUB)={1, 2, 4, 8}\{1, 2, 3, 4, 5, 6, 7, 8}=mulțimea vida

11.

a)D8={1, 2, 4, 8} ; D10={1, 2, 5, 10}

Intersecția = {1, 2}

Reuniunea = {1, 2, 4, 5, 8, 10}

D8\D10={4, 8}

b)D5={1, 5} ; D4={1, 2, 4}

Intersecția = {1}

Reuniunea = {1, 2, 4, 5}

D5\D4={5}

c)D6nD10={1, 2, 3, 6}n{1, 2, 5, 10}={1, 2}

D12UD10={1, 2, 3, 4, 5, 6, 10, 12}

D6nD10nD12={1,2}

D6UD10UD12={1, 2, 3, 4, 5, 6, 10, 12}

12.

a)M2={0, 2, 4, ...} ; M9={0, 9, 18, ...}

M2nM9={0}

b)M4nM6={0}

c)M10nM3={0}

d)M3nM6nM9={0}

13.

a)D2nD0=mulțimea vida

b)M3nM4=mulțimea vida