ta có:\(A=\frac{100^{10}+1}{100^{10}-1}=\frac{100^{10}-1+2}{100^{10}-1}=\frac{100^{10}-1}{100^{100}-1}+\frac{2}{100^{10}-1}=1+\frac{2}{100^{10}-1}\)
\(B=\frac{100^{10}-1}{100^{10}-3}=\frac{100^{10}-3+2}{100^{10}-3}=\frac{100^{10}-3}{100^{10}-3}+\frac{2}{100^{10}-3}=1+\frac{2}{100^{10}-3}\)
vì 10010-1>10010-3
\(\Rightarrow\frac{2}{100^{10}-1}<\frac{2}{100^{10}-3}\)
=>A<B