Question

1- Dada a função f(x) = 3x - 12, calcule:
a) f(0)
b) f(3)
c) f(-2)
d) f(10)
e) f(-5)​

Answer 1

Explicação passo-a-passo:

$\sf f(x)=3x-12$

a) $\sf f(0)$

$\sf f(0)=3\cdot0-12$

$\sf f(0)=0-12$

$\sf f(0)=-12$

b) $\sf f(3)$

$\sf f(3)=3\cdot3-12$

$\sf f(3)=9-12$

$\sf f(3)=-3$

c) $\sf f(-2)$

$\sf f(-2)=3\cdot(-2)-12$

$\sf f(-2)=-6-12$

$\sf f(-2)=-18$

d) $\sf f(10)$

$\sf f(10)=3\cdot10-12$

$\sf f(10)=30-12$

$\sf f(10)=18$

e) $\sf f(-5)$

$\sf f(-5)=3\cdot(-5)-12$

$\sf f(-5)=-15-12$

$\sf f(-5)=-27$