Cho minh hoi bai nay. Chi can tra loi 1 cau cung duoc! Tick cho ai tra loi som nhat, day du nhat.
1. Cho so huu ti y=2a-1/-3. Voi gia tri nao cua a thi y la so duong, y la so am, khong phai so duong cung phai so am?
2. Cho so huu ti x=a-5/a (a khac 0). Voi gia tri nao cua a thi x la so nguyen?
3. Cho so huu ti x=a-3/2a (a khac 0). Voi gia tri nao cua a thi x la so nguyen?

bai 1

cho bieu thuc A = 5/n+1 voi N THUOC Z

a, de A la phan so thi n co dieu kien gi ?

b , tim tat ca cac gia tri nguyen cua n de gia tri A la 1 so nguyen ?

bai 2

cho bieu thuc M = 6/n-3 voi n thuoc Z .Co bao nhieu gia tri cua n de :

a, M ko phai la phan so

b , M la phan so va cp gia tri nguyen ?

bai 3 viet tap hop cacs so nguyen sao cho :

-12/4 < x <6/3

cho so huu ti \(x=\frac{a+17}{a}\left(a\ne0\right)\) ,  voi gia tri nguyen nao cua a thi x la so nguyen

Cho A =n+1/n-1 . Voi gia tri nao cua n thi A la so chan , A la so nguyen am

a) tim gia tri nho nhat cua bieu thuc : A = | 1-x | + 8

b) tim cac so nguyen x biet 13 la boi cua x - 4

c) tim so nguyen x sao cho ( x + 5 ) chia het cho ( x + 3 )

giup minh voi! minh can gap gap gap.....

cho so huu ti x = a-5 /a  ( akhac 0) 

voi gia tri nguyen nao cua a thi x nguyen

bai 1:tim so nguyen x sao cho gia cua cac phan so la so nguyen

a)x+3/x-2

b)x²+3x-2/x+2

chu y:dau / la dau chia trong phan so

bai 2:cho A=2n+1/n-2 voi n la so nguyen

a)tim n de a la phan so

b)tim n de A nguyen

c)tinh gia tri cua A biet:n=2;1;-2;-1

giup minh voi minh dang can.Ai dung minh tick cho

Cho so huu ti x=\(\frac{a-3}{2}\)

Voi gia tri nao cua xthi

a ) la so nguyen duong

b) la so nguyen am

c) x ko la duong cung ko am

Cho bieu thuc \(A=\left(\frac{x+1}{x-1}-\frac{x-1}{x+1}+\frac{x^2-4x-1}{x^2-1}\right).\frac{x+2016}{x}\)
 

a, Voi gia tri nguyen nao cua x thi bieu thuc A co gia tri nguyen

b,Voi gia tri nao cua x thi A co gia tri duong