S=\(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+.....+\frac{1}{9.10}\)
S=\(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{9}-\frac{1}{10}\)
S=\(\frac{1}{10}-1\)
S=\(\frac{9}{10}\)
Tinh tong S =1/1.2+1/2.3+1/3.4+...+1/2014.2015+1/2015.2016
tinh tong:
S=1/1.2+1/2.3+1/3.4+...+1/2011.2012
(2.1.2+1/1.2) + (2.2.3+1/2.3) + (2.3.4+1/3.4) +...+ (2.9.10/9.10) = ?
tính
S = 1/1.2 + 1/2.3+1/3.4+....+1/9.10
giùm mik với nha ai trả lời thì mik sẽ tick cho
Tính
a 1/1.2+1/2.3+1/3.4+.......+1/9.10
1/1.2+5/2.3+11/3.4+...+89/9.10
tinh tong S=1.2+2.3+3.4+...............+99.100
10.(1/1.2+5/2.3+11/3.4+...+89/9.10)
Tinh tong S=1.2+2.3+3.4+4.5+...+99.100
