Question

seja função f(x)=2/(x-3) calcule o valor de f 1/2​

Answer 1

$f(x) = \frac{2}{x - 3} \\ \\ f( \frac{1}{2} ) = \frac{2}{ \frac{1}{2} - 3 } \\ \\ f( \frac{1}{2} ) = \frac{2}{ \frac{1}{2} - \frac{6}{2} } \\ \\ f( \frac{1}{2} ) = \frac{2}{ - \frac{5}{2} } \\ \\ f( \frac{1}{2} ) = 2 \times - \frac{ 2}{5} \\ \\ f( \frac{1}{2} ) = - \frac{4}{5} = -0.8$