Question

Se considera multimile E={x ∈ N* | x < 4} si F={y ∈ N | y=4-x, x ∈ E}
Aratati ca E=F.

Answer 1

 E={x ∈ N* | x < 4}

E={1,2,3}

 F={y ∈ N | y=4-x, x ∈ E}
y=4-x       y=4-1=3    y=4-2=2  y=4-3=1

F={1,2,3}

rezulta E=F