Question

I need help with question 26

Answer 1

$\left( \frac { 1 }{ 169 } \right) ={ \left( \frac { 1 }{ 13 } \right) }^{ 2 }=\frac { { 1 }^{ 2 } }{ { 13 }^{ 2 } }$

Answer 2

$\dfrac{1}{169}=\left(\dfrac{1}{13}\right)^x\\ \left(\dfrac{1}{13}\right)^2=\left(\dfrac{1}{13}\right)^x\\ x=2$