Các câu hỏi tương tự
chung minh 3/1nhan 4+ 3/4nhan 7+...+3/91nhan 94<1
chung tỏ 3/1nhan 4+3/4nhan 7+...+3/91nhan 94
2nhan(x-4)+4nhan(x-3)-x+1=3nhan(2x-3)-7
a)chung minh A= 2^1+2^2+2^3+2^4+...2^2010chia het cho 3
b)chung minh B= 3^1+3^2+3^3+3^4+...3^2010chia het cho 4
c)chung minh C= 5^1+5^2+5^3+5^4+...5^2010chia het cho 6
d)chung minh D= 7^1+7^2+7^3+7^4+...7^2010chia het cho 8
tim x biet: 4nhan[x-3]-x=3
cho s =3/1*4+3/4*7+3/7*10+......+3/43*46.chung minh rang s <1
M=3^5+3^6+3^7+3^8+3^9+3^10.Chứng minh M chia hết cho 91
a=1/1+3+1/1+3+5+1/1+3+5+7+......+1/1+3+5+7+...+2017
chung minh a<3/4
A=1/1+3+ 1/1+3+5+............+ 1/1+3+5+7+.........+2017
chung minh A<3/4