BĂNG NHAU

Ta có:

72⁴⁵ - 72⁴⁴ = 72⁴⁴.(72 - 1) = 72⁴⁴.71

72⁴⁴ - 72⁴³ = 72⁴³.(72 - 1) = 72⁴³.71

Vì 72⁴⁴.71 > 72⁴³.71

=> 72⁴⁵ - 72⁴⁴ > 72⁴⁴ - 72⁴³

Ta có:

\(72^{45}-72^{44}=72^{44}\left(72-1\right)=72^{44}.71\)

\(72^{44}-72^{43}=72^{43}\left(72-1\right)=72^{43}.71\)

Vì \(72^{44}.71>72^{43}.71\) nên \(72^{45}-72^{44}>72^{44}-72^{43}\)

bằng nhau

Ta có: \(72^{45}-72^{44}=72^{44}\left(72-1\right)\)

          \(72^{44}-72^{43}=72^{43}\left(72-1\right)\)

=> \(72^{44}\left(72-1\right)>72^{43}\left(72-1\right)\) hay \(72^{45}-72^{44}>72^{44}-72^{43}\)

T_i_c_k nha

72^45-72^44>72^44-72^43

72⁴⁵ - 72⁴⁴ = 72⁴⁴ - 72⁴³

       72¹      =          72¹

\(72^{45}-72^{44}=72^{44}\times\left(72-1\right)=72^{44}\times71\)

\(72^{44}-72^{43}=72^{43}\times\left(72-1\right)=72^{43}\times71\)

Vì \(44>43\Rightarrow72^{44}>72^{43}\Rightarrow72^{44}\times71>72^{43}\times71\)

\(\Rightarrow72^{45}-72^{44}>72^{44}-71^{43}\)

\(72^{45}-72^{44}=72^{44}.\left(72-1\right)=72^{44}.71\)

\(72^{44}-72^{43}=72^{43}.\left(72-1\right)=72^{43}.71\)

Vì \(72^{44}>72^{43}\Rightarrow72^{45}-72^{44}>72^{44}-72^{43}\)

Ta có:

72⁴⁵ - 72⁴⁴ = 72⁴⁴.(72 - 1)

72⁴⁴ - 72⁴³ = 72⁴³.(72 - 1)

Vì 72⁴⁴ > 72⁴³

=> 72⁴⁵ - 72⁴⁴ > 72⁴⁴ - 72⁴³

Ủng hộ mk nha ^_-

bằng nhau