Question

aba.aa=aaaa tim ab

Answer 1

ta có : 

aba = aaaa : aa 

       = 101

=> ab = 10 

Answer 2

​\(\overline{aba}\cdot\overline{aa}=\overline{aaaa}\)

\(\overline{aba}=\overline{aaaa}:\overline{aa}=101\left(tm\right)\)

\(\Rightarrow\overline{ab}=10\)

Answer 3

\(aba.aa=aaaa\)

\(\Leftrightarrow\dfrac{aba.aa}{aa}=\dfrac{aaaa}{aa}\)  

\(\Leftrightarrow aba=\dfrac{aaaa}{aa}\)

\(\Leftrightarrow aba=aa\)

Vậy giá trị của ab là aa