cho: A=\(\dfrac{34}{7.13}+\dfrac{51}{13.22}+\dfrac{85}{22.37}+\dfrac{68}{37.49}\)
B= \(\dfrac{39}{7.16}+\dfrac{65}{16.31}+\dfrac{52}{31.43}+\dfrac{26}{43.49}\)
tính \(\dfrac{A}{B}\)
help me!!!!!!!!!!!!!!!
giúp mình nha mình cần gấp
Cho 2 biểu thức :
\(A=\dfrac{34}{7.13}+\dfrac{51}{13.22}+\dfrac{85}{22.37}+\dfrac{68}{37.49}\)
\(B=\dfrac{39}{7.16}+\dfrac{65}{16.31}+\dfrac{52}{31.43}+\dfrac{26}{43.49}\)
Tính tỉ số \(\dfrac{A}{B}\)
Help me!!!!!!!!!!!!!!!
Ta có :
\(A=\dfrac{34}{7.13}+\dfrac{51}{13.22}+\dfrac{85}{22.37}+\dfrac{68}{37.49}\)
\(\dfrac{A}{17}=\dfrac{2}{7.13}+\dfrac{3}{13.22}+\dfrac{5}{22.37}+\dfrac{4}{37.49}\)
\(A.\dfrac{3}{17}=\dfrac{6}{7.13}+\dfrac{9}{13.22}+\dfrac{15}{22.37}+\dfrac{12}{37.49}\)
\(A.\dfrac{3}{17}=\dfrac{1}{7}-\dfrac{1}{13}+\dfrac{1}{13}-\dfrac{1}{22}+\dfrac{1}{22}-\dfrac{1}{37}+\dfrac{1}{37}-\dfrac{1}{49}\)
\(A.\dfrac{3}{17}=\dfrac{1}{7}-\dfrac{1}{49}\)
\(A.\dfrac{3}{17}=\dfrac{6}{49}\)
\(\Rightarrow A=\dfrac{6}{49}:\dfrac{3}{17}=\dfrac{34}{49}\)
\(B=\dfrac{39}{7.16}+\dfrac{65}{16.31}+\dfrac{52}{31.43}+\dfrac{26}{37.49}\)
\(\dfrac{B}{13}=\dfrac{3}{7.16}+\dfrac{5}{16.31}+\dfrac{4}{31.43}+\dfrac{2}{37.49}\)
\(B.\dfrac{3}{13}=\dfrac{9}{7.16}+\dfrac{15}{16.31}+\dfrac{12}{31.43}+\dfrac{6}{43.49}\)
\(B.\dfrac{3}{13}=\dfrac{1}{7}-\dfrac{1}{16}+\dfrac{1}{16}-\dfrac{1}{31}+\dfrac{1}{31}-\dfrac{1}{43}+\dfrac{1}{43}-\dfrac{1}{49}\)
\(B.\dfrac{3}{13}=\dfrac{1}{7}-\dfrac{1}{49}\)
\(B.\dfrac{3}{13}=\dfrac{1}{7}-\dfrac{1}{49}=\dfrac{6}{49}\)
\(\Rightarrow B=\dfrac{6}{49}:\dfrac{3}{13}=\dfrac{26}{49}\)
\(\Rightarrow\dfrac{A}{B}=\dfrac{34}{49}:\dfrac{26}{49}=\dfrac{17}{13}\)
Chúc bn học tốt!!!!!!!!!
Cho A=34\7.13+51\13.22+85\22.37+68\37.49 và B=39\7.16+65\16.31+52\31.43+52\31.43+26\43.49
Tính tỉ số A/B
Tính :(34/7.13+51/13.22+85/22.37+68/37.49):(39/7.16+65/16.31+52/31.43+26/43.49
Cho A= 34/7.13 + 51/13.22 +85/22.37+ 68/37.49 và B= 39/7.16 +65/16.31 +52/31.43 +26/43.49
Tính tỉ số A/B
tính tỉ số A/B biết
A=34/7.13+51/13.22+ 85/22.37+68/37.49; b= 39/7.16+65/16.31+52/31.43+26/43.49
ChoA=34/7.13+51/13.22+85/22.37+68/37.49
B=39/7.16+65/16.31+52/31.43+26/43.49
tính a/b biết
a= 34/7.13+51/13.22+85/22.37+68/37.49
b=39/7.16+65/16.31+52/31.43+26/43.49
Tính tỉ số A/B biết:
A=34/7.13+51/13.22+85/22.37+68/37.49
B+39/7.16+65/16.31+52/31.43+26/43.49
Giúp mình với nha mọi người.
Cho A=34/7.13+51/13.22+85/22.37+68/37.49
B=39/7.16+65/16.31+52/31.43+26/43.49
Tính tỉ số A/B