Ta có: \(\left(3n-4\right)⋮\left(n+1\right)\)
Mà \(3n-4=3\left(n+1\right)-7\)
\(\Rightarrow3\left(n+1\right)-7⋮\left(n+1\right)\)
Mà \(3\left(n+1\right)⋮\left(n+1\right)\)
\(\Rightarrow7⋮\left(n+1\right)\)
Lập bảng:
n + 1 | 1 | -1 | 7 | -7 |
n | 0 | -2 | 6 | -8 |
Vậy....