Question

determine o zero das funções afim a seguir.

a) f(x) = 3x + 2/5

b) f(x) = 1/2 - 2x

c) f(x) = 4 - 3/4x

d) f(x) = 32x

e) f(x) = -3 + 6x

f) f(x) = 8x - 12

Answer 1

Determinar o zero -> Igualar a 0

a)

f(x) = 3x + 2/5

3x + 2/5 = 0
3x = -2/5
x = -2/5 / 3
x = -2/15

b)

f(x) = 1/2 - 2x

1/2 - 2x = 0
1/2 = 2x
x = 1/2 / 2
x = 1/4

c)

f(x) = 4 - 3/4.x

4 - 3/4x = 0
4 = 3/4.x
x = 4 / 3/4
x = 16/3

d)

f(x) = 32x

32x = 0
x = 0/32
x = 0

e)

f(x) = -3 + 6x

-3 + 6x = 0
-3 = -6x
x = -3/-6
x = 1/2

f)

f(x) = 8x - 12

8x - 12 = 0
8x = 12
x = 12/8
x = 3/2