Answer :

[tex]\left( \frac { 1 }{ 169 } \right) ={ \left( \frac { 1 }{ 13 } \right) }^{ 2 }=\frac { { 1 }^{ 2 } }{ { 13 }^{ 2 } } [/tex]
konrad509
[tex]\dfrac{1}{169}=\left(\dfrac{1}{13}\right)^x\\ \left(\dfrac{1}{13}\right)^2=\left(\dfrac{1}{13}\right)^x\\ x=2[/tex]

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