Các câu hỏi tương tự
1/2.2+1/3.3+1/4.4+....+1/100.100<1
tính : A= 1/2.2+1/3.3+1/4.4+...+1/9.9
B=2/3.3+2/5.5+2/7.7+...+2/2007.2007
C=1/4.4+1/6.6+1/8.8+...+1/2006.2006
A = 1+ 1/ 2.2 + 1 / 3.3 +1/ 4.4 + ....+1/99.99 + 1/ 100. 100
tinh : A = (1 - 1/2.2) . (1 - 1/3.3) . (1 - 1/4.4)...(1 -1/100.100)
A=1+2.2!+3.3!+4.4!+...+100.100!
2/5<1/2.2+1/3.3+1/4.4+...+1/9.9<8/9
Chứng minh rằng:
a) A= 1/ 2.2 + 1/3.3 + 1/4.4 +....+ 1/100.100 < 1
M=1/2.2/3.3/4.4/5.......99/100 .Cmr 1/15<M<1/110
CMR: 1/2.2 +1/3.3+1/4.4+....+1/100.100<1
Mik cần gấp
Biết: n!=1*2*3*..n Tính: 1.1! + 2.2! + 3.3! + 4.4! + 5.5! = ?