biet so A lon hon trung binh cong cua so A va cac so : 1989 , 2003 , 2034 la 4 don vi . tim so A
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Biet so A lon hon trung binh cong cua so A va cac so 1986 , 1999 va 2013 la 32 don vi . Tim so A
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biet so a lon hon trung binh cong cua so ava cac so 1989,2003 va2034 la 4 don vi
Biet so A lon hon trung binh cong cua so A va cac so 1989;2003;2034 va 4 don vi.Tim so A.
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