Các câu hỏi tương tự
cho S = 2^1+2^+2^3+......+2^100
a) chung minh rang S chia het cho 15
b) tim chu so tan cung cua S
C) tinh tong S
cho biểu thuc B =2+2mu2+2mu3+.......+2mu99+2mu100
A. Chung minh rang Bchia het cho 31
b.tim x de 2mu2x-1-1=B
B=\(^{2+2^2+2^3+...+2^{59}+2^{60}}\)
a, chung to rang B chia het cho 3,5,7
b,tim chu so tan cung cua B
Cho S =1+3+3^2+3^3+.........+3^48+3^49
a)Chung to S chia het cho 4
b)Tim chu so tan cung cua S
c)Chung to S=3^50-1/2
CHO S=3+3^2+3^3+..........+3^100
a,chung minh S chia het cho4
b,chung minh 2S+3 la luy thua cua 3
c,tim chu so tan cung cua S
S = 2^1 + 2^2 + 2^3 +.........+2^100
a) cm S chia het cho 15
b)chu so tan cung cua S
c) S= ?
cho bieu thuc A= 2+2mu2 + 2mu3 +.....+2mu40
chung to rang A chia het cho 3, 7
tinh tong A . tim so tu nhien x de A+2 = 2 mua x-1
Chung to tong sau co chia het cho 3 hay k
2+2mu2+2mu3+2mu4+2mu5+2mu6+2mu7+2mu8+2mu9+2mu10
cho S=5+ 5 mu 2 + 5mu3+.....+5mu96
chung minh S chia het cho 156
tim chu so tan cung cua S
minh dang can gap ai gai gup voi