Question

f(x)=3x³-1 entao f(0)+f(-1)+f(1/2) qual a resposta?

Answer 1

Olá.
 
• f(x) = 3x³ - 1

$f(0) = 3(0)^{3} - 1$
$f(0) = -1$

$f(-1) = 3(-1)^{3} - 1$
$f(-1) = -3 - 1$
$f(-1) = -4$

$f(1/2) = 3(1/2)^{3} - 1$
$f(1/2) = 3(1/8) - 1$
$f(1/2) = \frac{3}{8} - 1$
$f(1/2) = \frac{3}{8} - \frac{8}{8}$
$f(1/2) = \frac{-5}{8}$

$\cdot \ f(0) + f(-1) = f(1/2) =$
$-1 - 4 - \frac{5}{8} =$
$-5 - \frac{5}{8} =$
$\frac{-40}{8} - \frac{5}{8} =$
$\frac{-45}{8}$

Bons estudos.

Answer 2

f(x) = 3x³ - 1

f(0) + f(-1) + f(1/2)

(3.0³ - 1) + (3.(-1)³ - 1) + (3.(1/2)³ - 1)

(0 - 1) + (-3 - 1) + (3/8 - 1)

- 1 - 4 + (3 - 8)/8

-5 + (-5/8) = (-40 - 5)/8 = -45/8

Espero ter ajudado.