a) aaa : a = a . 111 : a = 111
b) abab : ab = ab . 101 : ab= 101
c) abcabc : abc = abc . 1001 : abc = 1001
d) abcabc : (7 . 11 . 13) = abc . 1001 : 1001 = abc
a) aaa : a = a,111 : a = 111
b) abab : ab = ab,101 : ab = 101
c) abcabc : abc = abc,1001 : abc = 1001
d) abcabc : (7,11,13) = abc,1001 : 1001 = abc
đúng nha Trần Kiều Giáng Hương