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pé pun
a﴿ 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 + abc x 1
= abc000 + abc
= abcabc
![](https://rs.olm.vn/images/avt/0.png?1311)
a / ab.101=ab(100+1)
= ab.100+ab.1
=ab00+ab
=abab
b/ abc.7.11.13=abc.1001
=abc(1000+1)
=abc.1000+abc.1
=abc000+abc=abcabc
\(a,\overline{ab}\cdot101=\overline{abab}\)
\(b,\overline{abc}\cdot7\cdot11\cdot13=\overline{abc\cdot1001}=\overline{abcabc}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) ab . 101 = ab . ( 100 + 1 )
= ab . 100 + ab
= ab00 + ab
= abab
b) abc . 7 . 11 . 13 = abc . 1001
= abc . ( 1000 + 1 )
= abc . 1000 + abc
= abcabc
![](https://rs.olm.vn/images/avt/0.png?1311)
ab.101
=abab
abc.7.11.13
=abc.(7.11.13)
=abc.1001
=abcabc
k nhé mọi người
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, ab . 101 = ab. ( 100 + 1 )
= ab.100 + ab
= ab00 + ab
= abab
b, abc . 7 . 11 . 13
= abc . 1001
= abc . ( 1000 + 1 )
= abc . 1000 + abc
= abc000 + abc
= abcabc