Question

Ajutați-mă va rog!!!!

Answer 1

A. -4≤x<3; x∈N=> x∈{0,1,2}
=> A={0,1,2}

B. -4≤x<3; x∈Z=> x∈{-4,-3,-2,-1,0,1,2}
=> B={-4,-3,-2,-1,0,1,2}

a) A U B ={-4,-3,-2,-1,0,1,2}=B
A ∩ B= {0,1,2}=A
A-B= Ø
B-A={-4,-3,-2,-1}
b) A⊂B | Adevarat
B⊂A | Fals
A⊂(A U B) | Adevarat
A⊂(B-A) | Fals

Answer 2

Răspuns:

Explicație pas cu pas:

A = {0, 1, 2}

B = {-4, -3, -2, -1, 0, 1, 2}

A U B =  {-4, -3, -2, -1, 0, 1, 2}

A ∩ B = {0, 1, 2}

A \ B = ∅

B \ A = {-4, -3, -2, -1}

__________

A ⊂ B adevarat

B ⊂ A fals

A ⊂ (A U B) adevarat

A ⊂ (B \ A) fals