Question

Determine os zeros das funções:
a)f(x)=x-3
b)f(x)=x+12
c)f(x)=4-x
d)f(x)=3x+18
e)f(x)=4x-9
f)f(x)=1/x+1

Answer 1

a) x-3=0
x=3

b) x+12=0
x=-12

c) 4-x=0
-x=-4 (-1)
x=4

d) 3x + 18=0
3x=-18
x=-18/3
x=6

e) 4x-9=0
4x=9
x=4/9

f) 1/x+1=0
1/x=-1
1=-x (-1)
x=-1

Answer 2

Determine os zeros das funções:

a)f(x)=x-3

x - 3 = 0

x = 0 + 3

x= 3

b)f(x)=x+12

x + 12 = 0

x = 0 - 12

x= - 12

c)f(x)=4-x

4 - x = 0

- x = 0 - 4

- x = - 4 (-1)

x= 4

d)f(x)=3x+18

3x + 18 = 0

3x = 0 - 18

3x = -18

x= -18/3

x= - 6

e)f(x)=4x-9

4x - 9 = 0

4x = 0 + 9

4x = 9

x= 9/4

f)f(x)=1/x+1

1/x + 1 = 0

1/x = 0 - 1

1/x = - 1

x = - 1 • 1

x= - 1