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=\(70\left(\frac{121212}{565656}+\frac{121212}{727272}+\frac{121212}{909090}\right)\)
=\(70\left(\frac{3.40404}{14.40404}+\frac{121212}{6.121212}+\frac{2.60606}{15.60606}\right)\)
=\(70\left(\frac{3}{14}+\frac{1}{6}+\frac{2}{15}\right)\)
=\(70.\frac{18}{35}=38\)
\(B=70\cdot\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(B=70\cdot\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
\(B=70\cdot\frac{39}{70}\)
\(B=39\)
Vậy B = 39
B=\(70\times\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
B=\(70\times\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
B=\(70\times\frac{39}{70}\)
B=\(39\)
Nếu mk làm sai thì xin lỗi bạn nhiều nha
B=70.\(\left(\frac{13.10101}{56.10101}+\frac{13.10101}{72.10101}+\frac{13.10101}{90.10101}\right)\)
B=70.\(\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
B=70.\(\frac{39}{70}\)=39
ks nha
B= 70.( 131313/565656 + 131313/727272 + 131313/909090)
B = 70 * ( 13/56 + 13/72 + 13/90)
B = 70* 0,1464....
B= 10,254050...
\(C=70.\left(131313.\left(\dfrac{1}{565656}+\dfrac{1}{727272}+\dfrac{1}{909090}\right)\right)\)
\(C=70.\left(131313.\dfrac{1}{235690}\right)\)
\(C=70.\dfrac{39}{70}\)
\(C=39\)
\(70.\left(\frac{252525}{565656}+\frac{252525}{727272}+\frac{252525}{909090}\right)\)
\(=70.\left(\frac{25}{56}+\frac{25}{72}+\frac{25}{90}\right)\)
\(=70.25.\left(\frac{1}{7.8}+\frac{1}{8.9}+\frac{1}{9.10}\right)\)
\(=1750.\left(\frac{1}{7}-\frac{1}{8}+\frac{1}{8}-\frac{1}{9}+\frac{1}{9}-\frac{1}{10}\right)\)
\(=1750.\left(\frac{1}{7}-\frac{1}{10}\right)\)
\(=1750.\frac{3}{70}\)
\(=75\)
Tính :
\(=70.\left(\frac{25}{56}+\frac{25}{72}+\frac{25}{90}\right)\)
=\(70.\frac{15}{14}\)
=75
knha
\(B=70.\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(B=70.\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
\(B=70.13.\left(\frac{1}{56}+\frac{1}{72}+\frac{1}{90}\right)\)
\(B=910.\left(\frac{1}{7.8}+\frac{1}{8.9}+\frac{1}{9.10}\right)\)
\(B=910.\left(\frac{1}{7}-\frac{1}{8}+\frac{1}{8}-\frac{1}{9}+\frac{1}{9}-\frac{1}{10}\right)\)
\(B=910.\left[\frac{1}{7}+\left(\frac{1}{8}-\frac{1}{8}\right)+\left(\frac{1}{9}-\frac{1}{9}\right)-\frac{1}{10}\right]\)
\(B=910.\left[\frac{1}{7}-\frac{1}{10}\right]\)
\(B=910.\frac{3}{70}=39\)
~ Hok tốt ~
9898988 x 90909090 x 70
= 899907991000920 x 70
= 6.29935593700644e+16