\(A=\frac{12}{5^{2012}}+\frac{18}{5^{2013}}\)
\(B=\frac{18}{5^{2012}}+\frac{12}{5^{2013}}\)
=> \(A=\frac{12}{5^{2012}}+\frac{12}{5^{2013}}+\frac{6}{5^{2013}}\)
\(B=\frac{12}{5^{2012}}+\frac{12}{5^{2013}}+\frac{6}{5^{2012}}\)
Mà \(\frac{6}{5^{2012}}>\frac{6}{5^{2013}}\)
=> \(B>A\)
Vậy B > A
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