Question

Urgente! determine o valor (imagem)

Answer 1

Resposta:

$f(3) = \frac{2.3 - 7}{4} = \frac{6 - 7}{4} = \frac{ - 1}{4}$

$f(2) = \frac{2.2- 7}{4} = \frac{4 - 7}{4} = \frac{ - 3}{4}$

$f( \frac{1}{2} ) = \frac{2. \frac{1}{2} - 7}{4} = \frac{1 - 7}{4} = \frac{ - 6}{4}$

$\frac{f(3) - f(2)}{f( \frac{1}{2} )} = \frac{ \frac{ - 1}{4} - ( \frac{ - 3}{4} )}{ \frac{ - 6}{4} } \\ = \frac{ \frac{ - 1 + 3}{4} }{ \frac{ - 6}{4} } = \frac{ \frac{ 2}{4} }{ \frac{ - 6}{4} } = \\ = \frac{ 2}{4}. \frac{4}{( - 6)} = \frac{2}{( - 6)} = \frac{ - 1}{3}$