Question

[Đoàn Ngọc Linh]

\(M=\dfrac{26}{7.11}+\dfrac{65}{11.21}+\dfrac{39}{21.27}+\dfrac{143}{37.49}\)

\(N=\dfrac{51}{7.16}+\dfrac{17}{16.19}+\dfrac{35}{19.34}+\dfrac{85}{34.49}\)

Tính : \(P=\dfrac{M}{N}+\dfrac{29}{34}\)

HELP

Answer 1

[Phạm Hương Giang]

\(M=\dfrac{26}{7.11}+\dfrac{65}{11.21}+\dfrac{39}{21.27}+\dfrac{143}{27.49}\)

\(M=\dfrac{13.2}{7.11}+\dfrac{13.5}{11.21}+\dfrac{13.3}{21.27}+\dfrac{13.11}{27.49}\)

\(M=13.\dfrac{2}{7.11}+13.\dfrac{5}{11.21}+13.\dfrac{3}{21.27}+13.\dfrac{11}{27.49}\)

\(M=13.\left(\dfrac{2}{7.11}+\dfrac{5}{11.21}+\dfrac{3}{21.27}+\dfrac{11}{27.49}\right)\)

\(M=13.\dfrac{1}{2}\left(\dfrac{4}{7.11}+\dfrac{10}{11.21}+\dfrac{6}{21.27}+\dfrac{22}{27.49}\right)\)

\(M=\dfrac{13}{2}\left(\dfrac{1}{7}-\dfrac{1}{49}\right)\)

\(M=\dfrac{13}{2}.\dfrac{6}{49}=\dfrac{39}{49}\)

N sai đề rồi chuyển 35 thành 85 tính tương tự xong lấy \(P=\dfrac{M}{N}+\dfrac{34}{29}\)

P=2

Answer 2

[Ma Đức Minh]

M=26/7x11+65/11x21+39/21x27+143/37x49

M=26/77+65/231+13/189+143/1813

M=0,766705481

N=51/7x16+17/16x19+35/19x34+85/34x49

N=51/112+17/304+35/646+5/98

N=0,6164781702

P=0,766705481/0,6164781702+29/34

P=2,096627519