Question

f(-1)= $2^{(-1)}$ dividido por 5

Answer 1

$\frac{2}{5} ^{-1} = \frac{5}{2} ^{1} =\boxed{ \frac{5}{2} }$

Answer 2

$2^{-1}=\frac{1}{2} \ \ \ \ entao\\\\\frac{ 2^{-1}}{5}=\\\\\frac{1}{2.5}=\\\\\frac{1}{10}$