Question

Dada a função  f ( x ) = 2 ^ { - x + 3 } determine

a) f (1)
b) f (2)
c) f (3)
d) f (4)​

Answer 1

Resposta passo a passo:

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

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

$a) f(1)$

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

$f(1)=2^{2}$

$f(1)=4$

$b)f(2)$

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

$f(2)=2^{1}$

$f(2)=2$

$c)f(3)$

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

$f(3)=2^{0}$

$f(3)=1$

$d)f(4)$

$f(4)=2^{3-4}$

$f(4)=2^{-1}$

$f(4)=\frac{1}{2}$

$f(4)=0,5$