Cerinta: Comparati numerele .
7⁹⁰ = ( 7² ) ⁴⁵ = 49⁴⁵
6¹³⁵ = ( 6³ ) ⁴⁵ = 216⁴⁵
49⁴⁵ < 216 ⁴⁵ == > 7⁹⁰ < 6¹³⁵