\(\dfrac{5}{-6}=\dfrac{-55}{66};\dfrac{-10}{11}=\dfrac{-60}{66}\Rightarrow\dfrac{-55}{66}>\dfrac{-60}{66}\Rightarrow\dfrac{5}{-6}>\dfrac{-10}{11}\\ \dfrac{-3}{20}=\dfrac{-45}{300};\dfrac{2}{-15}=\dfrac{-40}{300}\Rightarrow\dfrac{-45}{300}< \dfrac{-40}{300}\Rightarrow\dfrac{-3}{20}< \dfrac{2}{-15}\\ -0,305>-0,36\)

\(^\circ\) \(\dfrac{5}{-6}\) và \(\dfrac{-10}{11}\)

Ta có \(:\)

\(\dfrac{5}{-6} = \dfrac{ 5 . 11 }{ -6 . 11 } = \dfrac{ 55 }{ -66} \)

\(\dfrac{-10}{11} = \dfrac{-10 . ( -6 )}{11.(-6)} = \dfrac{60}{-66}\)

Do \(55 < 60\)

\(=> \dfrac{55}{-66} > \dfrac{60}{-66}\)

Vậy \(\dfrac{55}{-66} > \dfrac{60}{-66}\)

\(\dfrac{-3}{20}\) và \(\dfrac{2}{-15}\)

Ta có :

\(\dfrac{-3}{20} = \dfrac{-3.3}{20.3}=\dfrac{-9}{60}\)

\(\dfrac{2}{-15} = \dfrac{2.4}{-15.4}= \dfrac{8}{-60}= \dfrac{-8}{60}\)

Do \(-9 <-8\)

\(=> \dfrac{-3}{20} < \dfrac{-2}{15}\)

Vậy \( \dfrac{-3}{20} < \dfrac{-2}{15}\)

ta thấy

\(\frac{2011}{2038}+\frac{27}{2038}=1\)

\(\frac{1904}{1931}+\frac{27}{1931}=1\)

mà\(\frac{27}{2038}>\frac{27}{1931}\Rightarrow\frac{2011}{2038}< \frac{1904}{1931}\Rightarrow\frac{-2011}{2038}>\frac{-1904}{1931}\)

vậy...

ta có: 2⁷ > 2⁶ = (2³)² = 8² > 7²

=> 2⁷ > 7²

#

Ta có :

2⁷= 128

7² = 49 

=> 2⁷>7²

Ta có : \(2^7>2^6=\left(2^3\right)^2=8^2\)

Mà : \(8^2>7^2\)Do 8 > 7 

=> \(2^7>7^2\)

Vậy \(2^7>7^2\)

Nguồn : Công Chúa ÔRI =))

Ngọc Nguyễn Minh sai be bét rồi -_-        

2³ = 8 chứ ko = 6

what lộn bài rồi bạn

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2³¹ = 2²⁵. 2⁶ = 2²⁵ . 64

Ta có 64 < 132

=> 2²⁵ . 64 < 2²⁵ . 132

=> 2³¹ < 132. 2²⁵

Vậy 2³¹ < 132 . 2²⁵

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plsss