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Đáp án:
`649/36`
Giải thích các bước giải:
`27` x `171717/272727` `+` `373737/363636` `=`
Rút gọn Phân số ta được:
`=` `27` x `17/27` `+` `37/36`
`=` `17` `+` `37/36` `=` `649/36`
![](https://rs.olm.vn/images/avt/0.png?1311)
= 18 x ( \(\dfrac{19}{21}\)+\(\dfrac{8}{9}\))+27 x \(\dfrac{17}{27}\)
=18 x \(\dfrac{113}{63}\)+27 x \(\dfrac{17}{27}\)
=\(\dfrac{226}{7}\)+17
=\(\dfrac{345}{7}\)
Chúc bạn học tốt!!
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\(\frac{252525}{373737}=\frac{252525:10101}{373737:10101}=\frac{25}{37}\)
\(\frac{272727}{353535}=\frac{272727:10101}{353535:10101}=\frac{27}{35}>\frac{27}{37}>\frac{25}{37}\)
vậy \(\frac{252525}{373737}
\(\frac{252525}{373737}=\frac{25.10101}{37.10101}=\frac{25}{37}=\frac{875}{1295}\)
\(\frac{272727}{353535}=\frac{27.10101}{35.10101}=\frac{27}{35}=\frac{999}{1295}\)
Vì \(\frac{875}{1295}
![](https://rs.olm.vn/images/avt/0.png?1311)
(93 x 272727 - 939393 x 27) x ( 103^34 + 56^79)
= ( 93 x 10101 x 27 - 93 x 10101 x 27) x ( 193^34 + 56^79)
= 0 x ( 193^34 + 56^79)
= 0
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\(\dfrac{55}{21}< \dfrac{134}{43}< \dfrac{116}{37}< \dfrac{74}{19}\)
\(\dfrac{74}{19}>\dfrac{116}{37}>\dfrac{134}{43}>\dfrac{55}{21}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(27\cdot\left(\dfrac{373737}{424242}+\dfrac{373737}{565656}+\dfrac{373737}{727272}\right)\\ =27\cdot\left(\dfrac{37}{42}+\dfrac{37}{56}+\dfrac{37}{72}\right)\\ =27\cdot37\cdot\left(\dfrac{1}{42}+\dfrac{1}{56}+\dfrac{1}{72}\right)\\ =999\cdot\left(\dfrac{1}{6\cdot7}+\dfrac{1}{7\cdot8}+\dfrac{1}{8\cdot9}\right)\\ =999\cdot\left(\dfrac{1}{6}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{8}+\dfrac{1}{8}-\dfrac{1}{9}\right)\\ =999\cdot\left(\dfrac{1}{6}-\dfrac{1}{9}\right)\\ =999\cdot\dfrac{1}{18}\\ =\dfrac{111}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2B=2^3+2^3+2^4+...+2^{21}\)
\(\Leftrightarrow B=2^{21}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2x x 16 = 128
2x = 128 : 16
2 x = 8
2x = 23
3x : 9 = 27
3x = 27 x 9
3x =243
3x = 35
[ 2x + 1 ]3 = 27
2x3 + 13 = 27
2x3 +1 = 27
2x3 = 27 - 1
2x3 = 26
Rút gọn phâ số ta dc:
\(=27.\frac{17}{27}+\frac{37}{36}\)
\(=17+\frac{37}{36}=\frac{649}{36}\)
\(=\frac{649}{36}\)nhé bạn