Question

4) Dada a lei de formação f(x) = 5x – 2, determine 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) y= -2 = 5.0 - 2

b) y= 13 = 5. 3-2

c) y= -52 =5.(-10) -2

d) y = 63 = 5.13 -2

Answer 2

Resposta:

a) x = 2/5

b) x = 1

c) x = -8/5

d) x = 3

Explicação passo a passo:

a) f(x) = 0

5x – 2 = 0

5x = 2

x = 2/5

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