\(\dfrac{2n+1}{n-5}\in Z\)
\(\Leftrightarrow2n+1⋮n-5\)
\(\Leftrightarrow2n-10+11⋮n-5\)
\(\Leftrightarrow2\left(n+5\right)+11⋮n-5\)
\(\Leftrightarrow11⋮n-5\)
\(\Leftrightarrow n-5\inƯ\left(11\right)\)
\(\Leftrightarrow n-5\in\left\{11;-11;-1;1\right\}\)
\(\Leftrightarrow n\in\left\{-6;6;16;4\right\}\)
tim tat ca cac so nguyen n sao cho 2n+3/7 la so nguyen
giupppppppppp
tim so nguyen duong n nho nhat sao cho n/2 la binh phuong cua mot so nguyen va n/5 la lap phuong cua 1 so nguyen
1,Tim cac so nguyen x va y sao cho (x-2)(y-1) =5.
2,Tim so nguyen n sao cho n+5 chia het cho 2n-1
bai 1
a, chung to rang 2n+5/n+3, ( n thuoc N ) la phan so toi gian
b, tim gia tri nguyen cua n de B= 2n+5/n+3 co gia tri la so nguyen
bai 2
tim so tu nhien nho nhat sao khi chia cho 3 du 1 cho 4 du 2 cho 5 du 3 cho 6 du 4 va chia het cho 11
tim so nguyen n de phan so 4n+5/2n-1 co gia tri la mot
so nguyen
tim so so nguyen n nho nhat sao cho n^2+5^n+1 la so nguyen to.
tra loi n=?
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
tim cac so nguyen duong m va n sao cho 3m-1/2n va 3n-1/2m cung la so nguyen duong
cac ban giai ho minh nha
1) Cho bieu thuc : A= 2n +1 /n-3 + 3n-5/ n-3 - 4n-5 /n-3
a)Tim so nguyen n de A nhan gia tri nguyen
b) Tim n de A la phan so toi gian
