Question

2,3,6 si7 va rog repede dau coroana la primu răspuns bun

Answer 1

2.  A = { a,b,c}
     B = {0,2}
AxB = {(a;0), (a;2), (b;0), (b;2), (c;0), (c;2)}
BxA = {(0;a), (0;b), (0;c), (2;a), (2;b), (2,c)}
BxB = {(0;0), (0;2), (2;0), (2;2)}

3. A={a,b,c}
    B={2,1}

6. A={(x,y) ∈ NxN |x+y=5}
    x ∈ {0,1,2,3,4,5}
    y ∈ {5,4,3,2,1,0}
A={(0;5), (1;4), (2;3), (3;2), (4;1), (5;0)}

7. A={(x,y) ∈ NxN |x·y=8}
    x ∈ {1,2,4,8}
    y ∈ {8,4,2,1}
A={(1;8), (2;4), (4;2), (8;1)}