Question

Sa se determine multimea
A= { x∈N | (x+1)²-3 ≤ 17+(x-1)²

Answer 1

x^2 + 2x + 1 -3 ≤ 17 + x^2 - 2x + 1
2x + 2x ≤ 17 + 3
4x ≤ 20
x ≤ 20 / 4
x ≤ 5
Rezulta ca A = {0, 1, 2, 3, 4, 5}