Question

[Tran Thuy Linh]

Tim tap hop cac so tu nhien sao cho

a) a+x=a;

b) a+x>a;

c) a+x<a

Answer 1

[Le Thi Khanh Huyen]

a. {0}

b. {1;2;3;...}=N*

c.{\(\phi\)}