\(t=\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{99.100}\)
\(t=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(t=1-\frac{1}{100}=\frac{99}{100}\)
Vậy \(t=\frac{99}{100}\)
Tính T=1/2+1/6+1/12+1/20+1/30+....+1/9702+1/9900
Tính T biết : 1/2+1/6+1/12+1/20+1/30+.........+1/9702+1/9900
tính T = 1/2 +1/6+1/12+1/20+1/30+...+1/9702+1/9900
T=
Tinh T = 1/2 +1/6 + 1/12+1/20+1/30...+1/9702+1/9900
1/2 +1/6 +1/12 +1/20 +1/30 + +1/9702 +1/9900=T .Tim T
1/2+ 1/6+ 1/12 +1/20+...+1/9702 +1/9900
1/2+1/6+1/12+1/20+1/30+.......+1/9702+1/9990
Tính giá trị biểu thức:
A= 1/2+1/6+1/12+1/20+1/30....+1/9900
tính giá trị biểu thức
a = 1 /2 + 1/6 + 1 /12 + 1/20 + 1/30 ....+ 1/9900
