Question

AJUDEM AE PRECISO PRA AMANHAM URGENTE
4)Dadas as funçoes : f(x) = 4x -2 e g(x) = - 5x+1, calcule
a) f(-3)=
b) g(2)=
c) f(1/3)+ g(1/6)=
d) x, para f(x) =18

Answer 1

A) f(-3) = 4.(-3) - 2 = -12 - 2 = - 10
B) g(2) = -5.(2) + 1 = - 9
C) f(1/3) = 4.(1/3) - 2 = -2/3
    g(1/6) = -5.(1/6) + 1 = 1/6
    f(1/3)+g(1/6) = -2/3 + 1/6 = -3/6
D) x, para f(x) = 18
     4x - 2 = 18
     4x = 20
     x = 5

Answer 2

A) f(-3)
f(x) = 4x - 2
f(3) = 4.(-3) - 2
f(3) = -12 - 2
f(3) = -14

B) g(2)
g(2) = (-5).2 +1
g(2) = -10 + 1
g(2) = -9

C) f(1/3) + g(1/6)
f(1/3) = 4.1/3 - 2
f(1/3) = 4/3 - 2
f(1/3) = - 2/3

g(1/6) = (-5).1/6 + 1
g(1/6) = -5/6 + 1
g(1/6) = 1/6

-2/3 + 1/6 = -0,5

D) f(x) = 18
18 = 4x - 2
18 + 2 = 4x
20 = 4x
x = 5

Espero que tenha ajudado!