Question

tim so nguyen x de cac phan so sau la so nguyen 13/x-1

Answer 1

=> x-1 \(\in\) Ư(13) = { 1,13,-1,-13 }

Ta có bảng :

x-1	1	13	-1	-13
x	2	14	0	-12

Vậy các số nguyên x là -12,2,14

Answer 2

13/x-1 la so nguyen thi 13 chia het cho x-1

suy ra x-1 thuoc uoc cua 13

ma UOC CUA 13 LA 13;1;-1;-13

khi x-1=13 thi x=14

khi x-1=1 thi x=2 

khi x-1 =-1 thi x=0

khi x-1 =-13 thi x=-12

vay cac so nguyen x la 14;2;0;-12