Question

04. Dadas as funções f (x) = 5x – 2 e g (x) = -2x – 6, calcular: (2,0) a) f (x) + g (x) = 0 b) 2 f (x) – 3 f (x) = 0
Pfvr ME AJUDEMMM!!!!

Answer 1

Resposta:

a) x = 8/3

b) x = - 7/8

Explicação passo-a-passo:

a) f(x) + g (x) = 0

f(x) = 5x – 2

g (x) = -2x – 6

(5x - 2) + (- 2x - 6) = 0

5x - 2 - 2x - 6 = 0

(5x - 2x) - 2 - 6 = 0

3x - 8 = 0

3x = 8

x = 8/3

b) 2.f(x) – 3f(x) = 0

2.(5x - 2) - 3.(- 2x - 6) = 0

10x - 4 + 6x + 18 = 0

(10x + 6x) - 4 + 18 = 0

16x + 14 = 0

16x = - 14

x = - 14/16 = - 7/8