Question

cum se rezolve ajutati si lamuriti A={x∫x=2k+1.k ∈ N,k≤4}

Answer 1

K<4(era mai mic sau egal)=>
K€{1,2,3,4}
x=2k+1
X=1×2+1
X=3
X=2×2+1
x=5
X=3×2+1
X=7
X=4×2+1
X=9
A€{3,5,7,9}
Sper ca te-am ajutat