Question

Determina multimea:
A={x apartine Z | (2x+1)/(x+1) apartine Z}​

Answer 1

Răspuns:

Explicație pas cu pas:

(2x + 1)/(x + 1) = (2x + 2 - 1)/(x + 1) = (2x + 2)/(x + 1) - 1/(x + 1)

= 2(x + 1)/(x + 1) - 1/(x + 1) = 2 - 1/(x + 1)

x + 1 = -1; + 1

x = -2; 0

A = {-2, 0}