=1-1/3-1/2+1/4+1/3-1/5-1/4+1/6+...+1/97-1/99-1/98+1/100
=1-1/2-1/99-1/98=2327/4851
=1-1/3-1/2+1/4+1/3-1/5-1/4+1/6+...+1/97-1/99-1/98+1/100
=1-1/2-1/99-1/98=2327/4851
chứng minh rằng:1/1.3 + 1/2.4 + 1/3.5 + 1/4.6 +....+ 1/97.99 + 1/98.100 < 3/4
chứng minh rằng 1^1.3 + 1^2.4 + 1^3.5 + 1^4.6 +...+ 1^97.99+ 1^98.100 < 3^4
Chứng minh rằng: \(\frac{1}{1.3}+\frac{1}{2.4}+\frac{1}{3.5}+\frac{1}{4.6}+...+\frac{1}{97.99}+\frac{1}{98.100}< \frac{3}{4}\)
1.3 + 2.4 + 3.5 + 4.6 +.........+ 97.99 + 98.100
1/1.3+1/2.4+1/3.5+....+1/97.99+1/98.100 <3/4
Cho S=1/1.3+1/2.4+1/3.5+....+1/97.99+1/98.100.
So sánh S và 1.
Tính
\(S=1.3+2.4+3.5+4.6+....+97.99+98.100..\)
TÍNH: a. \(1.3+3.5+....+97.99\)
b.\(1.3+2.4+3.5+....+98.100\)
c.\(2.4+4.6+....+98.100\)
Các bạn làm nhanh nhé:
A.1\3.1+1\10.7+1\17.24+....+1\73.80-1\2.9-1\9.16-...-1\23.30
B.1\1.3-1\3.10-1\3.5-1\4.6+...+1\97.99-1\98.100