Question

Va rog ex 1 5 6 din poza pusa urgent va rog,

Answer 1

Răspuns:

Explicație pas cu pas:

Ex1. a) {1}, {2}, {1,2}, ∅

b) {2},{3},{5},{2,3},{2,5},{3,5},{2,3,5},∅.

c) {a},{b},{c},{a,b},{a.c},{b,c},{a,b,c},∅.

Ex5. A={0,1,2,3},  B={1,2,3,4}

pentru multimea A, avem 3x≤10

daca x=0, 3·0≤10, adevarat

daca x=1, 3·1≤10, adevarat

daca x=2, 3·2≤10, adevarat

daca x=3, 3·3≤10, adevarat

daca x=4, 3·4≤10, fals

deci A={0,1,2,3},

pentru multimea B, avem x+2<7

daca x=1,  1+2<7, adevarat

daca x=2,  2+2<7, adevarat

daca x=3,  3+2<7, adevarat

daca x=4,  4+2<7, adevarat

daca x=5,  5+2<7, fals

DECI  B={1,2,3,4}

A⊄B,  B⊄A

Ex6. A={4,5,6,7},  B={4,5,6,7},  C={4,5,6,7},  D={3,4,5,6,7,8,9}, E={0,2,4}.

A=B=C.