Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
a = 172008 - 112008 - 32008
a = (174)502 - (...1) - (34)502
a = (...1)502 - (...1) - (...1)502
a = (...1) - (...1) - (...1)
a = (...0) - (...1)
a = (...9)
tim chu so tan cung cua so tu nhien a de :a^2+1 chia het cho 5
tim chu so tan cung cua A =2^2004
tim 2 chu so tan cung cua A=2^2004
a=11mau so la 200 + 6 mau so la 192 tim chu so tan cung cua a
A=1!+2!+3!+.......+n!
tim chu so tan cung cua A
tim chu so tan cung cua A=1+2^2+.....+2^2013
Cho A= 2+2^2+2^3+...+2^100
chung minh a chia het cho 3,15
tim chu so tan cung cua A
Cho A=3+32+33+...+32000 Tim chu so tan cung cua A
2) cho S=1+3^2+3^4+....+3^2008
a) tim so du trong phep chia S chia 91
b) tim chu so tan cung cua S
