Question

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

a) f(0)

b) f(x)= - 2

Answer 1

a) f(0)

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

b) f(x) = -2

1 - 5x = -2
5x = 1 + 2
5x = 3
x = 3/5

Answer 2

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


b) f(x)= - 2
f(x) = 1 - 5x
-2 = 1 - 5x
-2 -1 = -5x
-3 = - 5x
-3 · (-1) = -5x · (-1)
3 = 5x
5x = 3
x = 3/5



Bons estudos!