tính b

b=\(\frac{0,275-0,5+\frac{3}{11}}{0,625+0,5+\frac{5}{11}}:\frac{1,5+1-0,75}{2,5+\frac{5}{3}-1,25}\)

So sánh

A=\(\frac{1}{3}+\frac{1}{3^2}+\frac{1}{3^9}+.....+\frac{1}{3^{33}}với\frac{1}{2}\)

so sánh 2 số A và B nếu

\(A=-\frac{1}{2018}-\frac{3}{2017^2}-\frac{5}{2017^3}-\frac{7}{2017^4};B=\frac{-1}{2018}-\frac{7}{2017^2}-\frac{5}{2017^3}-\frac{3}{2017^4}\)

So sánh :

a) 3^-50 và 5^-30

b)\(A=\frac{1}{3}+\frac{1}{3^2}+\frac{1}{3^3}+...+\frac{1}{3^{100}}\) và \(B=\frac{1}{2}\)

So sánh (-3)⁵ và (-3)⁴

\(\left(-\frac{1}{5}\right)^{300}\) và \(\left(-\frac{1}{3}\right)^{500}\)

\(\left(-\frac{1}{2}\right)^{5^{1^3}}\) và \(\left(-\frac{1}{3}\right)^{3^{1^5}}\)

Cho A=\(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{4034},B=1+\frac{1}{3}+\frac{1}{5}+\frac{1}{7}+...+\frac{1}{4033}\). So sánh A/B với \(1\frac{2017}{2018}\)

Cho \(A=1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{4034},B=1+\frac{1}{3}+\frac{1}{5}+...+\frac{1}{4033}\).So sánh \(\frac{A}{B}\)với\(\frac{4035}{2018}\)

So sánh A và B nếu

\(A=\frac{-1}{2018}-\frac{3}{2017^2}-\frac{5}{2017^3}-\frac{7}{2017^4}\)

\(B=\frac{-1}{2018}-\frac{7}{2017^2}-\frac{5}{2017^3}-\frac{3}{2017^4}\)

so sánh: \(\left(\frac{-1}{5}\right)^{300}\)và \(\left(\frac{-1}{3}\right)^{500}\)