3^2019:(3^2020-24×3^2017) Question 3^2019:(3^2020-24×3^2017) in progress 0 Môn Toán Adela 4 years 2020-11-01T13:37:46+00:00 2020-11-01T13:37:46+00:00 2 Answers 60 views 0
Answers ( )
Đáp án:
$3$
Giải thích các bước giải:
$\dfrac{3^{2019}}{3^{2020}-24.3^{2017}}$
$=\dfrac{3^{2019}}{3^{2017}(3^3-24)}$
$=\dfrac{3^{2019}}{3^{2017}.3}$
$=\dfrac{3^{2019}}{3^{2018}}$
$=3$
Đáp án: $3$.
Giải thích các bước giải:
$3^{2019} : (3^{2020} – 24 . 3^{2017})$
$= 3^{2019} :[3^{2017} . (3^3 – 24)]$
$= 3^{2019} : [3^{2017} . (27 – 24)]$
$= 3^{2019} : (3^{2017} . 3)$
$= 3^{2019} : 3^{2018}$
$= 3$.