ta có 6n+49=6(n+5)+19
=> 19 chia hết cho n+5
\(n\inℤ\Rightarrow n+5\inℤ\)
=> n+5\(\inƯ\left(19\right)=\left\{-19;-1;1;19\right\}\)
ta có bảng
| n+5 | -19 | -1 | 1 | 19 |
| n | -24 | -6 | -4 | 14 |
Các câu hỏi tương tự
tim n thuoc z sao cho n+ 5 la boi cua n+1 va n+1 la boi cua n+5
cho B=n/n-3(n thuoc Z , n khac 3)
tim tat ca cac gia tri nguyen cua n de B la so nguyen
CHo C= 3n+5.n+7(n thuoc Z, N khac -7)
tim tat ca cac gia tri nguyen cua n de C la so nguyen
Cho phan so: P = \(\frac{2n+7}{5n+2}\)(n thuoc Z)
a)Tim n thuoc z de P la phan so chua toi gian.
b)Tim n thuoc Z sao cho P la phan so toi gian.
tim x thuoc Z biet
a)4n-5 chia het cho n
b)-11 la boi cua n-1
c)2n-1 la uoc cua 3n +2
tim x thuoc Z biet
a)4n-5 chia het cho n
b)-11 la boi cua n-1
c)2n-1 la uoc cua 3n +2
Tim so tu nhien n sao cho 3n+4 thuoc boi chung (5;n-1)
tim n thuoc z de a la so nguyen
6n-3/3n+1
Bai1 a,cho n thuoc N. Chung minh rang 6n+5 va 4n+3 la 2 so nguyen to cung nhau
b, tim so nguyen x sao cho x+2016 la so nguyen duong nho nhat
tim so nguyen n sao cho 6n+1 la boi cua 3n-1