Question

Stabiliti valoarea de adevar
+9/3 €Z
+3 1/2€Z+
N=Z+

Answer 1

$+ \frac{9}{3} = + 3 \: \in \: \mathbb{Z} \: \: (A)$

$+ 3 \frac{1}{2} = + \frac{3 \times 2 + 1}{2} = + \frac{6 + 1}{2} = + \frac{7}{2} \: \in \: \mathbb{Z} \: \: (F)$

$\mathbb{N}=\mathbb{Z_{+}}\:\:(F)$

Egalitatea era adevărată dacă :

$\mathbb{{N}^{*}}=\mathbb{Z_{+}}\:\:(A)$