Question

Dada a função f(x) = +2x -2. Calcule f(x) seguindo o exemplo da letra a):
a) f( -2) =?
f(-2) = +2x -2
f(-2) = +2.(-2) -2 substitua no valor de x o valor f(-2)
f(-2)= -4 -2
f(-2) = -6
ou
f(-2)=+2x-2
y=+2.(-2) -2
y= -4 -2
y= -6

RESPOSTA : f(-2) = -6, ou seja:
x= -2 e y= -6
Par ordenado (-2, -6)

b) f( -1) =
c) f( 0 ) =

d) f(+1) =
e) f(+2) =

Answer 1

Resposta:

b) f(-1)

f(-1) = 2.(-1)-2

f(-1) = -2-2

f(-1) = -4

c) f(0)

f(0) = 2.(0)-2

f(0) = 0-2

f(0) = -2

d) f(+1)

f(+1) = 2.(+1)-2

f(+1) = 2-2

f(+1) = 0

e) f(+2)

f(+2) = 2.(+2)-2

f(+2) = 4-2

f(+2) = 2

Answer 2

• F(x) = 2x - 2

b) F(-1) = 2x - 2

F(-1) = 2 × (-1) - 2

F(-1) = -2 -2

F(-1) = -4

Par ordenado (-1, -4)

c) F(0) = 2x - 2

F(0) = 2 × 0 - 2

F(0) = 0 - 2

F(0) = -2

Par ordenado (0, -2)

d) F(1) = 2x - 2

F(1) = 2 × 1 - 2

F(1) = 2 - 2

F(1) = 0

Par ordenado (1, 0)

e) F(2) = 2x - 2

F(2) = 2 × 2 - 2

F(2) = 4 - 2

F(2) = 2

Par ordenado (2, 2)

Espero ter ajudado!! -zCM