Question

ma ajutatiii

A∈{x∈N | (3x+11)÷(x+1) ∈N }

Answer 1

(3x+11)/(x+1)=(3x+3)/(x+1) +8/(x+1)=3+8/(x+1)
se cauta divizorii lui 8
D8={1,2,4,8}
x+1=1,x=0 ∈N
x+1=2,x=1 ∈N
x+1=4,x=3 ∈N
x+1=8,x=7∈N
x={0,1,3,7}