\(\frac{2323}{2424}=\frac{23.101}{24.101}=\frac{23}{24}\)

\(\frac{20132013}{20142014}=\frac{2013.10001}{2014.10001}=\frac{2013}{2014}\)

Ta có:

\(1-\frac{23}{24}=\frac{24}{24}-\frac{23}{24}=\frac{1}{24}\)

\(1-\frac{2013}{2014}=\frac{2014}{2014}-\frac{2013}{2014}=\frac{1}{2014}\)

Vì \(\frac{1}{24}>\frac{1}{2014}\) nên \(\frac{23}{24}< \frac{2013}{2014}\)

Vậy \(\frac{2323}{2424}< \frac{20132013}{20142014}\)

Tính phần bù với 1 nhé

mình cũng trình bày giống bạn "Muôn cảm súc"

thank you so much

Lời giải:

a)

\(\frac{64}{73}=1-\frac{9}{73}=1-\frac{18}{146}\); \(\frac{45}{51}=1-\frac{6}{51}=1-\frac{18}{153}\)

Mà \(\frac{18}{146}> \frac{18}{153}\Rightarrow 1-\frac{18}{146}< 1-\frac{18}{153}\)

\(\Rightarrow \frac{64}{73}<\frac{45}{51}\)

b)

\(\frac{2323}{2424}=\frac{2300+23}{2400+24}=\frac{23(100+1)}{24(100+1)}=\frac{23}{24}=1-\frac{1}{24}\)

\(\frac{20132013}{20142014}=\frac{20130000+2013}{20140000+2014}=\frac{2013(10000+1)}{2014(10000+1)}=\frac{2013}{2014}=1-\frac{1}{2014}\)

Mà \(\frac{1}{24}>\frac{1}{2014}\Rightarrow 1-\frac{1}{24}< 1-\frac{1}{2014}\Rightarrow \frac{2323}{2424}< \frac{20132013}{20142014}\)

a) Ta có: \(\frac{2012}{2013}+\frac{1}{2013}=1\)

\(\frac{2013}{2014}+\frac{1}{2014}=1\)

Vì \(\frac{1}{2013}>\frac{1}{2014}\) nên \(\frac{2012}{2013}< \frac{2013}{2014}\)

Vậy: \(\frac{2012}{2013}< \frac{2013}{2014}\)

b) \(\frac{1006}{1007}+\frac{1}{1007}=1\)

\(\frac{2013}{2015}+\frac{2}{2015}=1\)

Mà \(\frac{1}{1007}=\frac{2}{2014}>\frac{2}{2015}\)

nên: \(\frac{1006}{1007}< \frac{2013}{2015}\)

Vậy:.......

Ta có:  \(\frac{123}{124}< 1\)

            \(\frac{20142014}{20132013}=\frac{2014}{2013}>1\)

Vậy  \(\frac{123}{124}< \frac{20142014}{20132013}\)

p/s: chúc bạn học tốt

Ta có: \(\frac{20142014}{20132013}=\frac{2014}{2013}\)

Lại có: \(\frac{123}{124}=\frac{124-1}{124}=1-\frac{1}{124}\Rightarrow\frac{123}{124}< 1\) (1)

\(\frac{2014}{2013}=\frac{2013+1}{2013}=1+\frac{1}{2013}\Rightarrow\frac{2014}{2013}>1\)(2)

Từ (1)(2) => \(\frac{123}{123}< \frac{2014}{2013}hay\frac{123}{124}< \frac{20142014}{20132013}\)

A = (2 + 2²) + (2³ + 2⁴ ) +…(2¹⁹⁹ + 2²⁰⁰)

A = 6 + 2² (2 + 2² ) +… + 2¹⁹⁸ (2 + 2²)

A = 6 + 2² (6 ) +… + 2¹⁹⁸ (6)

A = 6(1 + 2² +… + 2¹⁹⁸)

Vậy A chia hết cho 6

ta có A=\(\frac{20132013}{20142014}\)=\(\frac{2013.10001}{2014.10001}\)=\(\frac{2013}{2014}\)

B=\(\frac{131313}{141414}\)=\(\frac{13.10101}{14.10101}\)=\(\frac{13}{14}\)

xét 1-\(\frac{2013}{2014}\)=\(\frac{1}{2014}\);1-\(\frac{13}{14}\)=\(\frac{1}{14}\)

vì \(\frac{1}{2014}\)<\(\frac{1}{14}\) suy ra \(\frac{2013}{2014}\)>\(\frac{13}{14}\)suy ra A>B

Vậy ..................................

Ta có: 

\(A=\frac{20132013}{20142014}\)

\(A=\frac{20132013\div10001}{20142014\div10001}\)

\(A=\frac{2013}{2014}\)

và \(B=\frac{131313}{141414}\)

\(B=\frac{131313\div10101}{141414\div10101}\)

\(B=\frac{13}{14}\)

ta có: \(A=\frac{2013}{2014}=1-\frac{1}{2014}\)

và \(B=\frac{13}{14}=1-\frac{1}{14}\)

vì \(\frac{1}{14}>\frac{1}{2014}\)

Nên \(1-\frac{1}{14}< 1-\frac{1}{2014}\)

Hay A > B

Lời giải:

$a=\frac{20132013}{20142014}=\frac{20132013:10001}{20142014:10001}=\frac{2013}{2014}> \frac{2013}{2015}$

Hay $a> b$