Question

aflati x daca (2x-3)|34.Si explicatia va rog.

Answer 1

x∈ℕ

(2x-3)|34⇒ 2x-3∈D₃₄ ⇒ 2x-3∈ {1, 2, 17, 34 }|+3 ⇒2x ∈{4, 5, 20, 37}|:2

⇒ x ∈ {2, 10}

Am reținut numai valorile naturale ale lui x.

Answer 2

(2x-3)|34⇒ 2x-3∈D₃₄ ⇒ 2x-3∈ {1, 2, 17, 34 }|+3 ⇒2x ∈{4, 5, 20, 37}|:2 =>x∈{2,10}