Question

2 - Dada a função f(x)=3^(2x-3), calcule: f( 1 /2) * 5 pontos a) 1/8 b) 1/9 c) 1/12 d) 1/15

Answer 1

Oie, Td Bom?!

■ Resposta: Opção B.

$f(x) = 3 {}^{2x - 3}$

$f( \frac{1}{2} ) = 3 {}^{2 \: . \: \frac{1}{2} - 3 }$

$f( \frac{1}{2} ) = 3 {}^{1 - 3}$

$f( \frac{1}{2} ) = 3 {}^{ - 2}$

$f( \frac{1}{2} ) = \frac{1}{3 {}^{2} }$

$f( \frac{1}{2} ) = \frac{1}{9}$

Att. Makaveli1996