Question

Dada à função do 1° grau F(x) = (1 - 5x). Determinar:
a) f(0)
b) f(-1)
c)f(1/5)
d) f(-1/5)​

Answer 1

Resposta:

f(x) = 1 - 5x

a)

f(0) = 1 - 5(0)

f(0) = 1 - 0

f(0) = 1

b)

f(-1) = 1 - 5(-1)

f(-1) = 1 + 5

f(-1) = 6

c)

$f( \frac{1}{5} ) = 1 - 5( \frac{1}{5} ) \\ \\ f( \frac{1}{5} ) = 1 - \frac{5}{5} \\ \\ f( \frac{1}{5} ) = \frac{5 - 5}{5} \\ \\ f( \frac{1}{5} ) = \frac{0}{5} \:= \:0$

d)

$f( - \frac{1}{5} ) = 1 - 5( - \frac{1}{5} ) \\ \\ f( - \frac{1}{5} ) =1 + \frac{5}{5} \\ \\ f( - \frac{1}{5} ) = \frac{5 + 5}{5} \\ \\ f( - \frac{1}{5} ) = \frac{10}{5}\: = \:2$

Bons Estudos!