A=40/31x39+35/39x46+30/2392+25/2964
B=91/19x31+65/19x43+39/989+143/1311
tính A/B
A=40/3 x38 + 35/39x46 + 30/2392 + 25/2962 va B=91/19x31 + 65/19x43 + 39/989 + 143/1311.Tinh A/B
Cho: A=40/31X38 +35/39X46+30/2392+25/2962 và B=91/19X31+65/19X43+39/989+143.Tinh A/B
Tìm tỉ số giữa A và B, biết:
\(A=\frac{40}{31.39}+\frac{35}{39.46}+\frac{30}{46.52}+\frac{25}{52.57};B=\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{23.43}+\frac{143}{69.19}\)
\(A=\frac{40}{31}-\frac{40}{39}+\frac{35}{39}-\frac{35}{46}+\frac{30}{46}-\frac{30}{52}+\frac{25}{52}-\frac{25}{57}\)
\(A=\frac{1}{31}-\frac{1}{39}+\frac{1}{39}-\frac{1}{46}+\frac{1}{46}-\frac{1}{52}+\frac{1}{52}-\frac{1}{57}\)
\(A=\frac{1}{31}-\frac{1}{57}\)
tiếp theo tính A và B tương tự rồi tìm tỉ số, ta lấy A:B*100=?%
\(A=\frac{40}{31.39}+\frac{35}{39.16}+\frac{30}{23.92}+\frac{25}{29.64}\) ; \(B=\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\).
Tính tỉ số A/B
Cho A=\(\frac{40}{31.38}+\frac{35}{39.46}+\frac{30}{2392}+\frac{25}{2962}\) và B=\(\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\).Tìm \(\frac{A}{B}\)
tìm tỉ số A/B
A= \(\frac{4}{7x31}+\frac{6}{7x41}+\frac{9}{10x41}+\frac{7}{10x51}\)
B= \(\frac{7}{19X31}+\frac{5}{19X43}+\frac{3}{23X43}+\frac{11}{23X57}\)
Tìm tỉ số \(\frac{A}{B}\) biết:
a) \(A=\frac{4}{31.7}+\frac{6}{7.41}+\frac{9}{10.41}+\frac{7}{10.57}\) ; \(B=\frac{7}{19.31}+\frac{5}{19.43}+\frac{3}{23.43}+\frac{11}{23.57}\)
b) \(A=\frac{40}{31.39}+\frac{35}{39.46}+\frac{30}{46.52}+\frac{25}{52.57}\); \(B=\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{23.43}+\frac{143}{69.19}\)
Tính tổng:
E =\(\frac{40}{31.38}+\frac{35}{39.46}+\frac{30}{2392}+\frac{25}{2962}\)
F =\(\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\)
