Cho \(A=\frac{5}{2^2}+\frac{5}{2^3}+\frac{5}{2^4}+...+\frac{5}{2^{100}}\)
So sánh \(A\)với \(\frac{2}{3}\)
Cho \(A=\frac{1}{2}.\frac{3}{4}.\frac{5}{6}...\frac{999}{1000}\)
So sánh A với \(\frac{1}{100}\)
1:
a) Cho A= \(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{100^2}\) . So sánh A và \(\frac{199}{100}\)
b) Tìm tích: \(\frac{3}{2^2}.\frac{8}{3^2}.\frac{15}{4^2}.\frac{24}{5^2}.....\frac{99}{10^2}\)
cho \(M=\frac{1}{2}.\frac{3}{4}.\frac{5}{6}....\frac{99}{100};N=\frac{2}{3}.\frac{4}{5}.\frac{6}{7}....\frac{100}{101}\)
a/ so sánh M và N
b/ tính M nhân N
c/ CMR : M < 1 / 10
BT1: Cho C=\(\frac{1}{3}\)+\(\frac{1}{5}\)+\(\frac{1}{9}\)+\(\frac{1}{17}\)+\(\frac{1}{33}\)+\(\frac{1}{65}\)
Hãy so sánh C với 1
D=\(\frac{1}{5^2}\)-\(\frac{2}{5^3}\)+\(\frac{3}{5^4}\)-\(\frac{4}{5^5}\)+......+\(\frac{99}{5^{100}}\)-\(\frac{100}{5^{101}}\)
Hãy so sánh D với \(\frac{1}{16}\)
Cho
\(S=\frac{1}{3}-\frac{2}{3^2}+\frac{3}{3^{ }3}-\frac{4}{3^{ }4}+...+\frac{99}{3^{ }99}-\frac{100}{3^{ }100}\)
So sánh S và \(\frac{1}{5}\)
So Sánh A vs B :
A=\(\frac{100^{2009}+1}{100^{2008}+1}\) B=\(\frac{100^{2010}+1}{100^{2009}+1}\)
A=\(\frac{5^0+5^1+5^2+5^3+.....+5^9}{5^0+5^1+5^2+.....+5^8}\) B=\(\frac{3^0+3^1+3^2+.....+3^9}{3^0+3^1+3^2+.....+3^8}\)
Cho M=\(\frac{1}{2}.\frac{3}{4}.\frac{5}{6}....\frac{99}{100}\)
N=\(\frac{2}{3}.\frac{4}{5}.\frac{6}{7}.\frac{100}{101}\)
a, So sánh M và N
b, Tính M, N
c, CM M<\(\frac{1}{10}\)
1) CMR:
\(\frac{1}{3^2}+\frac{1}{4^2}+\frac{1}{5^2}+\frac{1}{6^2}+...+\frac{1}{100^2}< \frac{1}{2}\)Ai nhanh mk tick
2) So sánh 2 số:
\(A=\frac{5^{2018}-2016}{5^{2018}-2017}\)\(Với\)\(B=\frac{5^{2018}-2018}{5^{2018}-2019}\)