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1616x 2 + 1616x 3 + 1616x 4 +1616x 1
= 2/6 + 3/6 + 4/6 + 1/6
= 10/6
= 5/3
1/6 x 2 + 1/6 x 3 + 1/6 x 4 + 1/6 x 1
= 1/6 x ( 2 + 3 + 4 + 1 )
= 1/6 x 10 = 10/6 = 5/3
đ/s: 5/3
\(\frac{1}{10}\cdot\frac{2}{3}\cdot\frac{3}{4}\cdot\frac{4}{5}\cdot\frac{5}{6}\cdot\frac{6}{5}\cdot\frac{5}{4}\cdot\frac{4}{3}\cdot\frac{3}{2}=\frac{1}{10}\)
\(\frac{1}{10}\times\frac{2}{3}\times\frac{3}{4}\times\frac{4}{5}\times\frac{5}{6}\times\frac{6}{5}\times\frac{5}{4}\times\frac{4}{3}\times\frac{3}{2}\)\(\frac{3}{2}\)
\(=\frac{1}{10}\times\left(\frac{2}{3}\times\frac{3}{2}\right)\times\left(\frac{3}{4}\times\frac{4}{3}\right)\times\left(\frac{4}{5}\times\frac{5}{4}\right)\times\left(\frac{5}{6}\times\frac{6}{5}\right)\)
\(=\frac{1}{10}\times1\times1\times1\times1\)
\(=\frac{1}{10}\)
#Chúc bạn học tốt !
#k cho mình nhé ?
\(\frac{1}{9}+\frac{1}{10}+\frac{3}{8}=\frac{40}{360}+\frac{36}{360}+\frac{135}{360}=\frac{211}{360}\)
Ủng hộ mk nha ^_-
\(\hept{\begin{cases}\\\end{cases}22\hept{\begin{cases}\\\end{cases}}2\orbr{\begin{cases}\\\end{cases}}22\orbr{\begin{cases}\\\end{cases}}\tan}\)
=>3/6+4/6<x<16/4-5/4 K NHA MOI NGUOI
=>7/6<x<11/4
=>28/24<x<66/24
=>x=48/24=2
\(\frac{1}{2}:\frac{3}{2}:\frac{5}{4}:\frac{6}{5}:\frac{7}{6}:\frac{8}{7}\)
\(=\frac{1}{2}\cdot\frac{2}{3}\cdot\frac{4}{5}\cdot\frac{5}{6}\cdot\frac{6}{7}\cdot\frac{7}{8}\)
\(=\frac{1\cdot\left(2\cdot5\cdot6\cdot7\right)}{8\cdot3\cdot\left(2\cdot5\cdot6\cdot7\right)}\)
\(=\frac{1}{24}\)
\(\frac{1}{2}\cdot\frac{2}{3}\cdot\frac{3}{4}\cdot\frac{4}{5}\cdot\frac{5}{6}\cdot\frac{6}{7}\cdot\frac{7}{8}\cdot\frac{8}{9}\cdot\frac{9}{10}\)
\(=\frac{1\cdot\left(2\cdot3\cdot4\cdot5\cdot6\cdot7\cdot8\cdot9\right)}{\left(2\cdot3\cdot4\cdot5\cdot6\cdot7\cdot8\cdot9\right)\cdot10}\)
\(=\frac{1}{10}\)
\(\frac{1}{2}+\frac{3}{4}=\frac{2}{4}+\frac{3}{4}=\frac{5}{4}\) \(\frac{16}{6}-\frac{7}{6}=\frac{9}{6}=\frac{3}{2}\)
\(\frac{2}{6}\)+ \(\frac{1}{3}\)= \(\frac{2}{6}\)+ \(\frac{2}{6}\)= \(\frac{4}{6}\)= \(\frac{2}{3}\)
2/6 + 1/3 = 2/6 + 2/6 = 4/6 = 2/3