Question

dada a função do 1º grau F ( x ) = (1-5x), determinar F (1/5)

Answer 1

f(x)=1-5x   => f(1/5) substituir o valor entre parenteses no lugar do X

f(1/5)=1-5(1/5)

f(1/5)=1-5/5

f(1/5)=1-1 => 0

Answer 2

$f(x)=1-5x\\\\\\f\left(\dfrac{1}{5}\right)=1-5\left(\dfrac{1}{5}\right)\\\\\\f\left(\dfrac{1}{5}\right)=1-\dfrac{5}{5}\\\\\\f\left(\dfrac{1}{5}\right)=1-1\\\\\\\boxed{f\left(\dfrac{1}{5}\right)=0}$