Question

1) Dada a função do 1° grau f(x) = 1 - 5x, determine:

a) f(0) c) f(2)
b) f(-1) d) f(5)

2) Dada a função f (x) = 8x + 15 calcule.

a) f(0) – f(3)
b) f(5) – f(10)

3) Dada a função g(x) = x² + 2x – 3, determine

a) g(-2)
b) g(3)

Answer 1

1-f(x) = 1 - 5x
a) f(0)
f(0)= 1-5*0
f(0)=1-0
f(0)=1

b) f(-1)
f(-1)=1-5*(-1)
f(-1)=1-(-5)
f(-1)=6

c) f(2)
f(2)=1-5*2
f(2)=1-10
f(2)=-9

d) f(5)
f(5)=1-5*5
f(5)=1-25
f(5)=-24