A = 10 ^ 11 + 1/10 ^ 12 + 1 <10 ^ 11 + 1 + 9/10 ^ 12 + 1 + 9 = 10^11+10/10^12+10=10(10^10+1) / 10(10^11+1)=10^10+1/10^11+1=B
=> A < B
A>B ai tích mình tích lại
kết quả : A>B
ai tích mình tích lại nha
Nhân 2 vế với 10 ta có :
10A = \(\frac{10^{12}+10}{10^{12}+1}=\frac{10^{12}+1+9}{10^{12}+1}=\frac{10^{12}+1}{10^{12}+1}+\frac{9}{10^{12}+1}\)=\(1+\frac{9}{10^{12}+1}\)
10B = \(\frac{10^{11}+10}{10^{11}+1}=\frac{10^{11}+1+9}{10^{11}+1}=\frac{10^{11}+1}{10^{11}+1}+\frac{9}{10^{11}+1}\)
Vì \(10^{12}+1>10^{11}+1\)=>\(\frac{9}{10^{12}+1}<\frac{9}{10^{11}+1}\)=>\(1+\frac{9}{10^{12}+1}<1+\frac{9}{10^{11}+1}\)
=> 10A < 10B => A < B
k nha bạn