3n+4/n-1 thuộc Z
3n-3+7/n-1 thuộc Z
3n-3/n-1+7/n-1 thuộc Z
3+7/n-1 thuộc z
7/n-1 thuộc Z
=> n-1 thuộc ước của 7
n-1=1;-1;7;-7
n = 0;2;6;8
tim tat ca cac gia tri nguyen cua n de phan so A=3n+2/n-1 co gia tri la so nguyen
tim cac gia tri nguyen cua n de phan so 6n-3 / 3n +1 co gia tri la so nguyen
Cho cac bieu thuc
A=n+6 phan n-5 va B=3n-9 phan n-6
a/ Tim gia tri nguyen cua n de A, B la phan so ?
b/ Tim gia tri nguyen cua n de A, B co gia tri nguyen?
c/ Tim gia tri nguyen cua n de A, B co gia tri nguyen lon nhat?
1.Tim cac chu so x va y de so 1x8y2 chia het cho 36
2.tim cac gia tri nguyen cua n de phan so A=3.n+2/n-1 co gia tri la so nguyen
3.tim cac chu so x y thoa man
(x-2)^2.(x-3)^2=4
4.tim so tu nhien x biet
(x-5):3/100=20.x/100 +5
cho x ; y la cac so nguyen to sao cho gia tri tuyet doi cua x cong gia tri tuyet doi cua y bang 5 so cap so nguyen (x;y) thoa man la
bai 1 so cac gia tri nguyen cua x de gia tri tuyet doi cua x + gia tri tuyet doi cua x-2 =0
bai 2 so cac gia tri nguyen cua x thoa man gia tri tuyet doi cua x-3 + gia tri tuyet doi cua 8-2x = 1 là
tap hop cac gia tri nguyen cua x thoa man (x^2+4x+13) chia het cho (x+4) co so phan tu la ..............
tap hop cac gia tri nguyen cua x thoa man (x mũ 2 +4x+13) chia het cho (x+4) co so phan tu la ??????????????????????????????????
5, Tim gia tri nguyen cua n de cac phan so sau co gia tri la so nguyen
\(A=\frac{3n+4}{n-1}\)
\(B=\frac{6n-3}{3n+1}\)