Question

Gnt, ajuda pfvr :( se tiver resolução pfvr colocar

Answer 1

$f(x) = \frac{x-1}{3+5x}$

f(1/x) = substitui x por 1/x

$f( \frac{1}{x}) = \frac{ \frac{1}{x}-1 }{3+5* \frac{1}{x} } \\\\f( \frac{1}{x}) = \frac{ \frac{1-x}{x} }{ \frac{3x+5}{x} } \\\\ f( \frac{1}{x}) = \frac{1-x}{\not x} * \frac{\not x}{3x+5} \\\\f( \frac{1}{x} )= \frac{1-x}{3x+5}$