Question

Scrieti elementele multimii:
A={x|x∈ N,x=2k+1,k ∈ N,k ≤ 3}

Answer 1

k - mai mic sau egal cu 3, k numar natural
x=2*3+1=7
x=2*2+1=5
x=2*1+1=3
x=2*0+1=1
x={1,3,5,7}