Lê Quốc Trần Anh Coordinator
12/07/2017 at 12:05-
Kayasari Ryuunosuke,the last row must be :
\(C=\dfrac{8}{9}.\dfrac{15}{16}=\dfrac{1.5}{3.2}=\dfrac{5}{6}\)
Lê Quốc Trần Anh selected this answer. -
\(C=\dfrac{8-\dfrac{8}{5}+\dfrac{8}{25}-\dfrac{8}{125}}{9-\dfrac{9}{5}+\dfrac{9}{25}-\dfrac{9}{125}}:\dfrac{161616}{151515}\)
\(C=\dfrac{8.\left(1-\dfrac{1}{5}+\dfrac{1}{25}-\dfrac{1}{125}\right)}{9.\left(1-\dfrac{1}{5}+\dfrac{1}{25}-\dfrac{1}{125}\right)}.\dfrac{15}{16}\)
\(C=\dfrac{8}{9}.\dfrac{15}{16}=\dfrac{1.5}{1.2}=\dfrac{5}{2}\)