a) \(\overline{ab}.101=\overline{ab}.\left(100+1\right)\)

\(=\overline{ab}.100+\overline{ab}\)

\(=\overline{ab00}+\overline{ab}\)

\(=\overline{abab}\)

b) \(\overline{abc}.7.11.13=\overline{ab}.1001\)

\(=\overline{ab}.\left(1000+1\right)\)

\(=\overline{ab}.1000+\overline{ab}\)

\(=\overline{ab000}+\overline{ab}\)

\(=\overline{ab0ab}\)

a)\(\overline{ab}\cdot101=\overline{ab}\cdot\left(100+1\right)\)

\(=\overline{ab}\cdot100+\overline{ab}\)

\(=\overline{ab00}+\overline{ab}\)

\(=\overline{abab}\)

b)\(\overline{abc}\cdot7\cdot11\cdot13=\overline{ab}\cdot1001\)

\(=\overline{ab}\cdot\left(1000+1\right)\)

\(=\overline{ab}\cdot1000+\overline{ab}\)

\(=\overline{ab000}+\overline{ab}\)

\(=\overline{ab0ab}\)

 giúp mình với

a) ab . 101 = abab

b) abc . 7 . 11 . 13 = abc . 1001 = abcabc

a. ab.101=abab

b. abc.7.11.13=abc.1001=abcabc

ab x 101 = ab x ( 100 + 1 ) 

= ab x 100 + ab x 1

= ab00 + ab

= abab

b ) abc x 7 x 11 x 13 = abc x 1001

abc x ( 1000 + 1 )

= abc x 1000 + ab x 1

= abc000 + abc = abcabc

ab x 101 = ab x ( 100 + 1 ) 

= ab x 100 + ab x 1

= ab00 + ab

= abab

b ) abc x 7 x 11 x 13 = abc x 1001

abc x ( 1000 + 1 )

= abc x 1000 + ab x 1

= abc000 + abc = abcabc

cảm ơn nha

a) abab

b) abcabc

a) abab

b) abcabc

\(a,abab\)

\(b,abcabc\)

a) ab . 101 = abab

b) abc . 7.11.13 = abc . 1001 = 234234

tick cho mình nha các bạn

a ab.101=abab

b abc.7.11.13=abc.1001=abcabc

Câu trả lời như vậy nè:

    ab . 101 = abab

    abc . 7 . 11 . 13 = abc . 1001 = abcabc   

           ( Dấu . là dấu nhân nhoa )