Respostas

  • Usuário do Brainly
2014-08-06T01:14:29-03:00
F(x)=-3x+2

a)
f(x)=- \frac{1}{2}

-3x+2=- \frac{1}{2}

 \frac{-6x+4=-1}{2}

-6x+4=-1

-6x=-5

6x=5

x= \frac{5}{6}

b)
f(x)=0

-3x+2=0

-3x=-2
3x=2

x= \frac{2}{3}

c)
f(x)=1

-3x+2=1
-3x=1-2
-3x=-1
3x=1

x= \frac{1}{3}