Question

Tìm n thuộc N để

2n + 13 chia hết ( n + 1 )

mk đg cần rất gấp ai nhanh mk tick

Answer 1

\(2n+13⋮n+1\Rightarrow2n+13⋮2\left(n+1\right)\Rightarrow2n+12⋮2n+2\Rightarrow2n+2+10⋮2n+2\)

\(\Rightarrow10⋮2n+2\Rightarrow2n+2\in U\left(10\right)\)

2n+2	-1	1	-2	2	-5	5	-10	10
n	\(\notin N\)	\(\notin N\)	\(\notin N\)	0	\(\notin N\)	\(\notin N\)	\(\notin N\)	4