Question

ab x x = abab

abc x x = abcabc

Answer 1

a: x*ab=abab

=>x=101

b: x*abc=abcabc

=>x=abcabc/abc=1001

Answer 2

Ta có: \(abab=ab\times100+ab=ab\times\left(100+1\right)=ab\times101\)

\(\Rightarrow ab\times x=ab\times101\)

\(x=101\)

______________________

Ta có: \(abcabc=abc\times1000+abc=abc\times\left(100+1\right)=abc\times1001\)

\(\Rightarrow abc\times x=abc\times1001\)

\(x=1001\)