Question

dada a funcao definida por f(x)=4x calcule a) f(2) b) f(0) c) f(-2)

Answer 1

a) f(2) = 4 . 2
f(2) = 8

b)f(0) = 4 . 0
f(0) = 0

c) f(-2) = 4 . (-2)
f(-2) = - 8

Answer 2

$f(x) = 4x$

$a) \: f(2) = 4 \times 2 \\ f(2) = \boxed{8}$

$b) \: f(0) = 4 \times 0 \\ f(0) = \boxed{0}$

$c) \: f( - 2) = 4 \times ( - 2) \\ f( - 2) = \boxed{ - 8}$