Question

2. Dada a lei da função f(x) = 5x-2determine o valor de x de modo que
a) F(x) - 0
b) F(x) = 3
c) F(x)=-10
d) F(x)=13​

Answer 1

Resposta:

a) x=2/5

b) x=1

c) x= -8/5

d x= 3

Explicação passo-a-passo:

a) f(x)=0 p/ f(x)=5x-2

=> 5x-2=0

=> 5x=0+2

=> 5x=2

=> x=⅖

b) f(x)= 3

=> 5x-2=3

=> 5x= 3+2

=> 5x= 5

=> x= 5/5

=> x= 1

c) f(x)= -10

=> 5x-2= -10

=> 5x= -10+2

=> 5x= -8

=> x= -8/5

d) f(x)= 13

=> 5x-2= 13

=> 5x= 13+2

=> 5x= 15

=> x= 15/5

=> x= 3