Question

 A=1/3+1/9-1/27phan5/3+5/9-5/27

ai nhanh kick cho 

mai to nap bai roi

Answer 1

\(A=\frac{\frac{1}{3}+\frac{1}{9}-\frac{1}{27}}{\frac{5}{3}+\frac{5}{9}-\frac{5}{27}}\)

\(\Leftrightarrow\frac{\frac{11}{27}}{\frac{55}{27}}\)

\(=\frac{11}{27}.\frac{27}{55}=\frac{1}{5}\)

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Answer 2

 A=\(\frac{1}{5}\)

Chúc ban làm bai tốt

Answer 3

A = \(\frac{1}{3}\)+ \(\frac{1}{9}\)-\(\frac{1}{27}\) phần \(\frac{5}{3}\)+\(\frac{5}{9}\)-\(\frac{5}{27}\)

A = 1 . ( 1/3 + 1/9 - 1/27) phần 5 . ( 1/5 + 5/9 - 5/27) ( Gạch bỏ : 1/3 + 1/9 - 1/27)

A = \(\frac{1}{5}\)