Question

3) Dada a função ƒ, com ƒ(x) = 5X + 2, determine:

a) ƒ(2) – ƒ(3)
b) ƒ(–4) + ƒ(–2)
c) ƒ(5) – ƒ(–3)
d) ƒ(10) – ƒ(5)

Answer 1

Resposta:

Abaixo

Explicação passo-a-passo:

$f(x)=5.x+2$

a)

$f(2)-f(3)$

$f(2)=5.2+2=10+2=12$

$f(3)=5.3+2=15+2=17$

$f(2)-f(3)=12-17=-5$

b)

$f(-4)+f(-2)$

$f(-4)=5.(-4)+2=-20+2=-18$

$f(2)=5.(-2)+2=-10+2=-8$

$f(-4)+f(-2)=-18+(-8)=-18-8=-26$

c)

$f(5)-f(-3)$

$f(5)=5.5+2=25+2=27$

$f(-3)=5.(-3)+2=-15+2=-13$

$f(5)-f(-3)=27-(-13)=27+13=40$

d)

$f(10)-f(5)$

$f(10)=5.10+2=50+2=52$

$f(5)=5.5+2=25+2=27$

$f(10)-f(5)=52-27=25$