Ta có : \(\frac{1919}{2323}x\frac{464646}{747474}x\frac{37}{19}\)

       \(=\frac{19}{23}x\frac{23}{37}x\frac{37}{19}\)

         \(=\frac{19x23x37}{23x37x19}\)

           \(=1\)

~ Chúc các bn học giỏi và may mắn ~

\(\frac{1919}{2323}.\frac{464646}{747474}.\frac{37}{19}\)

\(=\frac{1919:101}{2323:101}.\frac{464646:10101}{747474:10101}.\frac{37}{19}\)

\(=\frac{19}{23}.\frac{46}{74}.\frac{37}{19}\)

\(=\frac{19.46.37}{23.74.19}=\frac{19.23.2.37}{23.37.2.19}=1\)

\(=\dfrac{19}{23}\times\dfrac{23}{37}\times\dfrac{37}{19}=1\)

\(A=\frac{17}{19}x\frac{1}{6}+\frac{17}{19}x\frac{5}{6}\)

     \(=\frac{17}{19}x\left(\frac{1}{6}+\frac{5}{6}\right)=\frac{17}{19}x1=\frac{17}{19}\)

A= \(\frac{1717}{1919}\text{ *}\frac{303}{1818}+\frac{17}{19}\text{ *}\frac{1515}{1818}\)

A= \(\frac{17}{19}\text{ *}\frac{3}{18}+\frac{17}{19}\text{ *}\frac{15}{18}\)

A= \(\frac{17}{19}\text{ *}\left(\frac{3}{18}+\frac{15}{18}\right)\)

A= \(\frac{17}{19}\text{ *}1\)

A= \(\frac{17}{19}\)

Vậy A= \(\frac{17}{19}\)

vVv Học tốt nhé bạn, mình sẽ rất vui nếu bạn k đúng cho mình, cảm ơn ban nhiều vVv

A=19/23x46/74x37/19

A=1x2x1/1x2x1

A=2/2

A=1

A = 1919/2323 x 464646/747474 x 37/19

A = 19/23 x 46/74 x 39/19

A = 19x46x37/23x74x19

A = 1

 Vậy A = 1

23/27

19/23 x 23/37 x 37/19

= 37/27

\(\dfrac{1919}{2323}\times\dfrac{464646}{747474}\times\dfrac{37}{19}\)

\(=\)\(\dfrac{1919:101}{2323:101}\times\dfrac{464646:10101}{747474:10101}\times\dfrac{37}{19}\)

\(=\dfrac{19}{23}\times\dfrac{46}{74}\times\dfrac{37}{19}\)

\(=\dfrac{19\times23\times2\times37}{23\times2\times37\times19}=1\)

\(\frac{1414+1515+1616+1717+1818+1919}{2020+2121+2222+2323+2424+2525}\)

\(=\frac{101\times\left(14+15+16+17+18+19\right)}{101\times\left(20+21+22+23+24+25\right)}\)

\(=\frac{14+15+16+17+18+19}{20+21+22+23+24+25}\)

+) Tử số :

Số các số hạng là : ( 19 - 14 ) : 1 + 1 = 6 ( số )

Tổng là : ( 19 + 14 ) x 6 : 2 = 99

+) Mẫu số :

Số các số hạng là : ( 25 - 20 ) : 1 + 1 = 6 ( số )

Tổng là : ( 25 + 20 ) x 6 : 2 = 135

\(\Leftrightarrow\frac{99}{135}=\frac{11}{15}\)

\(\frac{1414+1515+1616+1717+1818+1919}{2020+2121+2222+2323+2424+2525}\)

= \(\frac{\left(1414+1919\right)+\left(1515+1818\right)+\left(1616+1717\right)}{\left(2020+2525\right)+\left(2121+2424\right)+\left(2222+2323\right)}\)

= \(\frac{3333+3333+3333}{4545+4545+4545}=\frac{3333}{4545}=\frac{11}{15}\)

t i c k nhé!! 45435436457

11/15

763*7*4)

😈