Răspuns :
Răspuns:
3/(x+1)
dam valori lui x
x=0
3/(0+1)=3/1=3 ∈ N
x=1
3/(1+1)=3/2 ∉ N
x=2
3/(2+1)=3/3=1 ∈ N
3/(3+1)=3/4 ∉ N
Răspuns: [tex]\pink{\bf ~x ~\in~\{0,2\} ~}[/tex]
Explicație pas cu pas:
[tex]\bf \dfrac{3}{x+1} ~\in~\mathbb{N}\Rightarrow x+1 \leq 3\Rightarrow x\leq 2[/tex]
[tex]\bf \blue{\underline{x = 2}} \Rightarrow \dfrac{3}{2+1}=\dfrac{3^{(3}}{3} = \red{\underline{1 \in \mathbb{N}}}[/tex]
[tex]\bf \blue{\underline{x = 1}} \Rightarrow \dfrac{3}{1+1}= \red{\dfrac{3}{2} \not \in \mathbb{N}}[/tex]
[tex]\bf \blue{\underline{x = 0}} \Rightarrow \dfrac{3}{0+1}=\dfrac{3}{1} = \red{\underline{3 \in \mathbb{N}}}[/tex]
[tex]\pink{\boxed{\bf ~x ~\in~\{0,2\} ~}}[/tex]
==pav38==