A= 70x(131313/565656+131313/272727+131313/909090)
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sorry lỡ nhấn vào trả lời mình làm tiếp nhé
\(\Leftrightarrow A=70.\left(\dfrac{1755+3640+1092}{7560}\right)=70.\dfrac{6487}{7560}\)
=>A=\(\dfrac{6487}{108}\)
A=70.(131313/565656+131313/272727+131313/909090)
\(\Leftrightarrow\) \(A=70.\left(\dfrac{13}{56}+\dfrac{13}{27}+\dfrac{13}{90}\right)\)
\(B=70\cdot\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(B=70\cdot\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
\(B=70\cdot\frac{39}{70}\)
\(B=39\)
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...
\(C=70.\left(131313.\left(\dfrac{1}{565656}+\dfrac{1}{727272}+\dfrac{1}{909090}\right)\right)\)
\(C=70.\left(131313.\dfrac{1}{235690}\right)\)
\(C=70.\dfrac{39}{70}\)
\(C=39\)
\(B=70.\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(B=70.\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
\(B=70.13.\left(\frac{1}{56}+\frac{1}{72}+\frac{1}{90}\right)\)
\(B=910.\left(\frac{1}{7.8}+\frac{1}{8.9}+\frac{1}{9.10}\right)\)
\(B=910.\left(\frac{1}{7}-\frac{1}{8}+\frac{1}{8}-\frac{1}{9}+\frac{1}{9}-\frac{1}{10}\right)\)
\(B=910.\left[\frac{1}{7}+\left(\frac{1}{8}-\frac{1}{8}\right)+\left(\frac{1}{9}-\frac{1}{9}\right)-\frac{1}{10}\right]\)
\(B=910.\left[\frac{1}{7}-\frac{1}{10}\right]\)
\(B=910.\frac{3}{70}=39\)
~ Hok tốt ~
\(B=70\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(B=70\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
\(B=70.13\left(\frac{1}{56}+\frac{1}{72}+\frac{1}{90}\right)\)
\(B=70.13.\frac{3}{70}\)
\(B=39\)
\(B=70\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(=70\left(\frac{13.10101}{56.10101}+\frac{13.10101}{72.10101}+\frac{13.10101}{90.10101}\right)\)
\(=70\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
\(=70.13\left(\frac{1}{56}+\frac{1}{72}+\frac{1}{90}\right)\)
\(=910\left(\frac{45}{2520}+\frac{35}{2520}+\frac{28}{2520}\right)\)
\(=910.\frac{3}{70}\)
\(=39\)
Vậy \(B=39\)