\(M=\frac{1}{16}\)

M= 9/40-11/60+13/84-15/112

M=378/1680-308/1680+260/1680-225/1680

M=\(\frac{378-308+260-225}{1680}\)

M=\(\frac{105}{1680}\)

M= \(\frac{1}{16}\)

M=1/16 pn nha

M=1/16 tin mình đi

\(M=\frac{9}{40}-\frac{11}{60}+\frac{13}{84}-\frac{15}{112}\)      

\(M=\left(\frac{9}{40}-\frac{11}{60}\right)+\left(\frac{13}{84}-\frac{15}{112}\right)\)   

\(M=\frac{1}{24}+\frac{1}{48}\)    

\(M=\frac{1}{16}\)

\(\frac{1}{16}\)

Ta có: \(M=\dfrac{9}{40}-\dfrac{11}{60}+\dfrac{13}{84}-\dfrac{15}{112}\)

\(=\dfrac{378}{1680}-\dfrac{308}{1680}+\dfrac{260}{1680}-\dfrac{225}{1680}\)

\(=\dfrac{105}{1680}=\dfrac{1}{16}\)

M=9/40-11/60+13/84-15/112

M=27/120-22/120+52/336-45/336

M=1/24+1/48

M=2/48+1/48=3/48=1/16

\(M=\dfrac{9}{40}-\dfrac{11}{60}+\dfrac{13}{84}-\dfrac{15}{112}\)

\(M=\left(\dfrac{90}{40}-\dfrac{11}{60}\right)+\left(\dfrac{13}{84}-\dfrac{15}{112}\right)\)

\(M=\dfrac{27}{120}-\dfrac{22}{120}+\dfrac{52}{336}-\dfrac{45}{336}\)

\(M=\dfrac{5}{120}+\dfrac{7}{336}\)

\(M=\dfrac{1}{24}+\dfrac{1}{48}\)

\(M=\dfrac{3}{48}=\dfrac{1}{16}\)

M=\(\dfrac{9}{40}-\dfrac{11}{60}+\dfrac{13}{84}-\dfrac{15}{112}\)

M=\(\dfrac{1}{24}+\dfrac{13}{84}-\dfrac{15}{112}\)

M=\(\dfrac{11}{56}-\dfrac{15}{112}\)

M=\(\dfrac{1}{16}\)

kết quả là \(\frac{1}{16}\) tích mk nha

M = 1/16  nhé

k mình nhé

M=3/1.2-5/2.3+7/3.4-9/4.5+11/5.6-13/6.7+15/7.8+17/8.9

   =(1/1.1+2/1.2)-(2/2.3+3/2.3)+(3/3.4+4/3.4)-(4/4.5+5/4.5)+...+(8/8.9+9/8.9)(phần ... là làm tương tự nhé)

   =1/2+1-(1/3+1/2)+(1/4+1/3)-(1/5+1/4)+...+(1/9+1/8)(phần ... là làm tương tự nhé)

   =1+(1/2-1/2)+(1/3-1/3)+(1/4-1/4)+...+(1/8-1/8)-1/9

   =1+0+0+0+...+0-1/9

   =1-1/9

   =8/9