\(\frac{3}{54}+\frac{5}{126}+\frac{7}{294}+\frac{8}{609}\)
\(=\frac{3}{6.9}+\frac{5}{9.14}+\frac{7}{14.21}+\frac{8}{21.29}\)
\(=\frac{1}{6}-\frac{1}{9}+\frac{1}{9}-\frac{1}{14}+\frac{1}{14}-\frac{1}{21}+\frac{1}{21}-\frac{1}{29}\)
\(=\frac{1}{6}-\frac{1}{29}=\frac{23}{174}\)
lm ơn giúp mk nha
làm xong mk tk cho
\(\frac{3}{54}+\frac{5}{126}+\frac{7}{294}+\frac{8}{609}\)
\(=\frac{3}{6.9}+\frac{5}{9.14}+\frac{7}{14.21}+\frac{8}{21.29}\)
\(=\frac{1}{6}-\frac{1}{9}+\frac{1}{9}-\frac{1}{14}+\frac{1}{14}-\frac{1}{21}+\frac{1}{21}-\frac{1}{29}\)
\(=\frac{1}{6}-\frac{1}{29}\)
\(=\frac{23}{174}\)
_Chúc bạn học tốt_
