trung binh cong cua hai so tu nhien la 2016 .neu tang so thu nhat len ba lan thi trung binh cong cua chung bang 4125.Vay so thu nhat la ?
trung binh cong cua 3 so la 24 neu gap so thu nhat len 2 lan thi trung binh cong cua chung la 28.neu gap so thu 2 len 3 lan thi trung binh cong cua chung la 36 .tim 3 so do
trung binh cong cua 3 so la 150 neu gap so thu nhat len 3 lan va giu nguyen cac so kia thi trung binh cong cua 3 so khi do la 162
trung binh cong cua hai so la 2011. tim so thu hai biet so thu nhat tang len gap doi thi trung binh cong bang 3014 . tim so thu hai
Trung binh cong cua 2 phan so = 7/8 Nếu tang phan so thu hai len gap 3 lan thi trung binh cong cua chung =17/8 Tim 2 phan so do
tbc cua 3 so la 67 trong do so thu nhat gap doi so thu 3 neu gap doi so thu nhat va so thu 3 thi trung binh cong cua chung bang 118 tim 3 so
trung binh cong cua hai so bang 2011 tim so thu hai biet so thu nhat tang gap doi thi trung binh cong hai so la 3014
cho 3 so tu nhien biet trung binh cong cua so thu nhat va so thu 2 la 258 , trung binh cong cua so thu 2 va so thu 3 la 336 ,trung binh cong cua so thu 1 va so thu 3 la 279 .tim so thu 3
TRUNG BINH CONG CUA 2 SO LA 123 . SO THU NHAT LA SO BE NHAT CO BA CHU SO . TIM SO THU HAI
TRUNG BINH CONG CUA HAI CHU SO LA 135 . TIM HAI SO DO, BIET RANG SO THU NHAT GAP 4 LAN SO THU HAI
GIUP MIK NHA , MOI NGUOI