tính ( ^ là mũ)
(-10/3)^5 . (-6/5)^4
làm ngắn gọn dễ hiểu ko lằng nhằng
tính ( ^ là mũ) (-10/3)^5 . (-6/5)^4 làm ngắn gọn dễ hiểu ko lằng nhằng
By Amaya
By Amaya
tính ( ^ là mũ)
(-10/3)^5 . (-6/5)^4
làm ngắn gọn dễ hiểu ko lằng nhằng
$(\dfrac{-10}{3})^5.(-\dfrac{-6}{5})^4$
$=\dfrac{(-10)^5}{3^5}.\dfrac{(-6)^4}{5^4}$
$=\dfrac{(-2.5)^5.(-2.3)^4}{3^5.5^4}$
$=\dfrac{(-2)^5.5^5.(-2)^4.3^4}{3^5.5^4}$
$=\dfrac{(-2)^9}{1}.\dfrac{5^5}{5^4}.\dfrac{3^4}{3^5}$
$=-512.5.\dfrac{1}{3}$
$=-2560.\dfrac{1}{3}=-\dfrac{2560}{3}$
$(\dfrac{-10}{3})^5$ . $(\dfrac{-6}{5})^4$
$= (\dfrac{-10}{3}).(\dfrac{-10}{3})^4$ . $(\dfrac{-6}{5})^4$
$= (\dfrac{-10}{3}).(\dfrac{60}{15})^4$
$= (\dfrac{-10}{3}).4^4$
$= \dfrac{-10}{3}.256$
$= \dfrac{-2560}{3}$