Question

Determinati elementele multimii A=(x apartine N, 2x+1/x+5 apartine N)

Answer 1

Răspuns:

A = { 1, 3, 5, 7, 9, 11, 13, 15, 17}

Explicație pas cu pas:

x = 0 => 2 × 0 + 1 = 1

x = 1 => 2 × 1 + 1 = 3

x = 2 => 2 × 2 + 1 = 5

x = 3 => 2 × 3 + 1 = 7

x = 4 => 2 × 4 + 1 = 9

x = 5 => 2 × 5 + 1 = 11

x = 6 => 2 × 6 + 1 = 13

x = 7 => 2 × 7 + 1 = 15

x = 8 => 2 × 8 + 1 = 17

x = 9 => 2 × 9 + 1 = 19