Các câu hỏi tương tự
Chung minh rang : 1+1/1!+1/2!+....+1/1994!<3 (help me !!!)
chung minh rang : 1 / 2 ^ 2 + 1 / 3 ^ 2 + 1 / 4 ^ 2 + . . . + 1 / 100 ^ 2 < 99 / 100
chung minh rang 1/3^2+1/4^2+1/5^2+...+1/100^2<1/2
chung minh rang 1\2 mu 2+1\3 mu 2+1\4 mu2+...+1\100 mu 2 < 1
chung minh rang :
1/3^2+1/4^2+1/5^2+1/6^2+...+1/100^2<1/2
chung minh rang
1/3^2+1/4^2+...............+1/100^2<1/2
Q= 1/2! + 2/3! + 3/4! + ... + n-1/n!
Chung minh rang : Q<1
Minh dang can gap. Giup minh voi!!
chung minh rang
1/3 + 2/3^2 + ... + 100/3^100<3/4
a,A=1/1^2+1/2^2+1/3^2+1/4^2+...+1/50^2.chung minh rang a<2
b;2^1+2^2+2^3+...+2^30.chung minh rang B chia het cho21