so sanh A=(2019^2019+2020^2019)^2020 va B=(2019^2020+2020^2020)^2019

0 bình luận về “so sanh A=(2019^2019+2020^2019)^2020 va B=(2019^2020+2020^2020)^2019”

1. B=(2019^2020+2020^2020)^2019

     = ( 2019^2019 × 2019 + 2020^ 2019 ×2020) ^2019 

   A=(2019^2019+2020^2019)^2020

      = ( 2019 ^2019 + 2020 ^2019) ^ 2019 × (2019^2019 + 2020^2019)

   ⇒ Lấy thử 

   B / A = ( 2019^2019 × 2019 + 2020^ 2019 ×2020) ^2019  / ( 2019 ^2019 + 2020 ^2019) ^ 2019 × (2019^2019 + 2020^2019)

   = 2019 + 2020 / (2019^2019 + 2020^2019)

   ⇒ A>B 

    

   Bình luận