Question

tim tat ca cac so tu nhien n biet : 3n + 1 chia het cho n - 1

Answer 1

\(3n+1⋮n-1\)

\(\Rightarrow3.\left(n-1\right)+4⋮n-1\)

Vì \(3.\left(n-1\right)⋮n-1\)=> \(4⋮n-1\)

Hay \(n-1\inƯ\left(4\right)=\left\{1;2;4\right\}\)

Ta có bảng sau : 

n-1	1	2	4
n	2	3	5

Vậy ....

Answer 2

cac ban lam tung buoc cho minh nhe..huhu

Answer 3

3n+1chia het cho n-1

-->3n-3+4 chia het cho n-1

-->4 chia het cho n-1

--> n-1 thuoc 2;1;4

-->n thuoc 2;3;5