Question

[Almira]

giúp mình nha mình tick cho

so sánh:

       c) 72\(^{45}\)-72\(^{44}\)và 72\(^{44}\)-72\(^{43}\)

       d) 199\(^{20}\)và  2003\(^{15}\)

Answer 1

[Anh vũ]

72⁴⁵-72⁴⁴=72^(45-44)=72¹=72

72⁴⁴-72⁴³=72^(44-43)=72¹=72

\(\Rightarrow\)72⁴⁵-72⁴⁴=72⁴⁴-72⁴³

Answer 2

[Sherlockichi Kudoyle]

\(72^{45}-72^{44}=72^{44}.72-72^{43}.72=72.\left(72^{44}-72^{43}\right)\)

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