Question

2-Seja f(x)= 5x+5, determine : a) f(1) b)f(3)

Answer 1

só Substituir:

F(1)=5.1+5→ 5+5=10

F(1)=10

F(3)=5.3+5→ 15+5=20

F(3)=20

Answer 2

Ok , vamos lá !!

Resoluções :

Letra A

$\sf f(x) = 5x + 5$

$\sf f(1) = 5\cdot 1 + 5$

$\sf f(1) = 5 + 5$

$\red{\sf f(1) = 10}$

Letra B

$\sf f(x) = 5x + 5$

$\sf f(3) = 5\cdot 3 + 5$

$\sf f(3) = 15 + 5$

$\red{\sf f(3) = 20}$

Bons estudos .