Respostas

  • Usuário do Brainly
2013-05-31T15:46:05-03:00

Para determinar o zero da função, faça \text{y}=0.

 

 

a) \text{y}=\text{x}-7

 

\text{x}-7=0

 

\text{x}=7

 

 

b) \text{y}=-\text{x}+10

 

-\text{x}+10=0

 

\text{x}=10

 

 

c) \text{y}=6-2\text{x}

 

6-2\text{x}=0

 

\text{x}=\dfrac{6}{2}=3

 

 

 

d) \text{y}=4\text{x}+3

 

4\text{x}+3=0

 

\text{x}=-\dfrac{3}{4}

 

 

e) \text{y}=2-9\text{x}

 

2-9\text{x}=0

 

\text{x}=\dfrac{2}{9} 

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