Question

f(x) = 5x – 1 b) Calcule f(- 2) e o valor de x para que f(x) = - 11

Answer 1

f(x) = 5x - 1
f(-2) = 5.(-2) - 1
f(-2) = - 10 - 1
f(-2) = - 11
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b)

f(x) = - 11

f(x) = 5x - 1
- 11 = 5x - 1
- 11 + 1 = 5x
 - 10 = 5x
5x = - 10
x = - 10/5
x = - 2