Question

dada a função real f(x) =5x-2 determine f(1) - f(-2) e (f(4)+f(2)/f(0)

Answer 1

Dada a função: f(x) = 5x - 2

Queremos determinar:

f(1) - f(- 2)

f(1) - f(- 2) = (5 * 1 - 2) - (5 * (- 2) - 2)

f(1) - f(- 2) = 5 - 2 - (- 10 - 2)

f(1) - f(- 2) = 3 - (- 12)

f(1) - f(- 2) = 3 + 12

f(1) - f(- 2) = 15

E determinar:

[f(4) + f(2)]/f(0)

[f(4) + f(2)]/f(0) = [(5 * 4 - 2) + (5 * 2 - 2)]/(5 * 0 - 2)

[f(4) + f(2)]/f(0) = [(20 - 2) + (10 - 2)]/(0 - 2)

[f(4) + f(2)]/f(0) = [(20 - 2) + (10 - 2)]/(- 2)

[f(4) + f(2)]/f(0) = - (18 + 8)/2

[f(4) + f(2)]/f(0) = - 26/2

[f(4) + f(2)]/f(0) = - 13