Ta có: \(\frac{131313}{565656}=\frac{131313:10101}{565656:10101}=\frac{13}{56}\)
\(\frac{131313}{727272}=\frac{13}{72}\)
\(\frac{131313}{909090}=\frac{13}{90}\)
\(\Rightarrow C=70\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)=70\left(\frac{39}{79}\right)=39\)
Vậy C = 39
C=70(\(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\))=70\(\frac{39}{70}\)=39
C=70.(13/56+13/72+13/90)
C=70.39/70
C=39
Edogawa Conan ơi ! cám ơn nhưng bạn viết sai chỗ\(70\)(\(\frac{39}{79}\)) rồi.
Phải là \(70\)\(\left(\frac{39}{70}\right)\)nhưng vẫn thank you