B=8102-2102
B=8100.64-2100.4
B=(...6).64-(..6).4
B=(...4)-(...4)
B=(....0)
vậy tận cùng của B là 0
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Các câu hỏi tương tự
tim chu so tan cung cua B=8102-2102
chu so tan cung cua bieu thuc a=1+2+4+6+8+...+102
a)tich cua so tu nhien tu 7 den 37 tan cung bang chu so gi?
b) Tich cua tat ca so le co 2 chu so tan cung bang chu so gi?
chu so tan cung
7^1991
5^1992
cmr
51^n+47^102 chia het cho 10
Tong cua 2 so la 78293 .so ,on co 3 chu so tan cung la 215.neu gach bo 3 chu so tan cung se ra so be.tim 2 so do
tong cua 2 so TN 102 . neu viet them chu so 0 roi viet them chu so 0 vao ben phai so be roi cong so lon ta duoc tong lon la 417. vay so lon la bao nhieu
1^2017+2^2017+........+8^2017+9^2017.Tim chu so tan cung cua tong tren ?
tim chu so tan cung cua moi so sau
A=8 mu 22
B= 2014 mu 2015
tong cua 2 so tu nhien la 102.Neu them chu so 0 vao ben phai so so be roi lai cong so lon ta duoc tong moi la 417 .Vay so lon la