Question

Multimea B = {x€ Z , 3x-5 : x+1 € Z}. Enumerati elementele mulțimii B .

Answer 1

$\frac{3x-5}{x+1}$∈Z
x+1/x+1⇒x+1/3x+3
x+1/3x-5⇒x+1/3x-5
Le scadem:x+1/8⇒x+1∈D8
                            x+1∈{1,2,4,8,-1,-2,-4,-8}
                            x∈{0,1,3,7,-2,-3,-5,-9}