Question

determine os zeros das seguintes funções constantes:
a) y= x-3
b) y= 2x+1
c) y= 4-2x
d) y= -7x+7
e) y= x+5
f) y= 1/2x-2

Answer 1

Olá!!

Resolução!!!

Zeros da função, sign. y = 0

a)
y = x - 3
0 = x - 3
x - 3 = 0
x = 3

b)
y = 2x + 1
0 = 2x + 1
2x + 1 = 0
2x = - 1
x = - 1/2

c)
y = 4 - 2x
0 = 4 - 2x
4 - 2x = 0
- 2x = - 4 • ( - 1 )
2x = 4
x = 4/2
x = 2

d)
y = - 7x + 7
0 = - 7x + 7
- 7x + 7 = 0
- 7x = - 7 • ( - 1 )
7x = 7
x = 7/7
x = 1

e)
y = x + 5
0 = x + 5
x + 5 = 0
x = - 5

f)
y = 1/2x - 2
0 = 1/2x - 2
1/2x - 2 = 0
1/2x = 2
x = 2 - 1/2
x = 3/2

Espero ter ajudado!!!