Question

Tim n thuoc Z ,sao cho:

(2.n+1) chia het cho (n-2)

ai dung cho 3 like!

giup nha mk dg can gap!!!!!!!!

Answer 1

2.n+1 : n-2 (minh ko biet viet dau chia het)

theo de ra ta co :

2.n+1 : n-2

=> 2.n-4+5 : n-2

do 2.n-4 : n-2 => 5: n-2

=>n thuoc { 1; 5; -1; -5}

Vay n thuoc {1; 5; -1; -5}

Answer 2

hinh nhu ket qua sai roi!

mk thu lai thay ko dung!!!

Answer 3

cau thu lai lan nua di. bai nay minh lam roi ma.

Answer 4

cau suy ra 5 chia het cho n-2 chu dau phai 5 chia het cho n ma xuong cau lai noi n thuoc {1;5;-1;-5}??????