Question

tim x thuoc Z:

A=x+1/x-2

        Ai nhanh mk tk cho nhe!

Answer 1

\(A=\frac{x+1}{x-2}=\frac{x-2+3}{x-2}=\frac{x-2}{x-2}+\frac{3}{x-2}=1+\frac{3}{x-2}\)

=> x-2 thuộc Ư(3) = {-1,-3,1,3}

Ta có bảng :

x-2	-1	-3	1	3
x	1	-1	3	5

Vậy x={-1,1,3,5}