Tìm n \(\in\)Z biết:
1, n+5\(⋮\)n-2
2,2n+1\(⋮\)2n-3
3,3n-1\(⋮\)3n-2
4, 2n+1v\(⋮\)n-5
5,6n-3\(⋮\)3n+1
6, 3n-1\(⋮\)n+2
7, 4-n\(⋮\)n+2
8, n+5\(⋮\)2n-1
9, n+4\(⋮\)3n+2
10,5n-1\(⋮\)3n+2
11, 3n\(⋮\)5-2n
12,3n+2\(⋮\)2n-1
13,n2-7\(⋮\)n+3
14,n2+3\(⋮\)n-1
15,n2+3n-13\(⋮\)n+3