A = \(\frac{4}{3.7}+\frac{4}{7.11}+\frac{4}{11.15}+...+\frac{4}{95.99}\)
A = \(\frac{1}{3}-\frac{1}{7}+\frac{1}{7}-\frac{1}{11}+\frac{1}{11}-\frac{1}{15}+...+\frac{1}{95}-\frac{1}{99}\)
A = \(\frac{1}{3}-\frac{1}{99}\)
A = \(\frac{32}{99}\)
Tính giá trị biểu thức \(A=\frac{4}{3.7}+\frac{4}{7.11}+\frac{4}{11.15}+...+\frac{4}{95.99}\)
Tính tổng:a)3+3/5+3/25+3/125+3/625
b)M=4/3.7+4/7.11+4/11.15+...+8/95.99
c)N=1/2+1/6+1/12+1/20+...+1/90
1)Tính tổng:a)3+3/5+3/25+3/125+3/625
b)M=4/3.7+4/7.11+4/11.15+...+8/95.99
c)N=1/2+1/6+1/12+1/20+...+1/90
2)Cho K=1+1/3+1/1/6+1/10+...+1/45 so sánh K với 2
Tính nhanh:A= 4/3.7+4/7.11+4/11.15+...+4/107.111
cho em hởi 4/3.7+4/7.11+4/11.15+...4/59.63 giúp em với ạ
Hãy tính 1 cách hợp lí:
\(\frac{1}{3.7}+\)\(\frac{1}{7.11}+\frac{1}{11.15}+......+\frac{1}{95.99}\)
tính tổng sau : \(A=\frac{4}{3.7}+\frac{4}{7.11}+\frac{4}{11.15}+...+\frac{4}{107.111}\)
\(\frac{4}{3.7}+\frac{4}{7.11}+\frac{4}{11.15}+\frac{4}{15.19}+\frac{4}{19.23}+\frac{4}{23.27}\)
Cho A=2/3.7 + 2/7.11 + 2/11.15 +...+2/n.(n+4) . Hãy so sánh A với 1/6
