Question

Sendo f(3x) = 6x + 5, calcule: a)f(x) b) f(5)

Answer 1

Resposta:

f(3x)=6x+5

a)

Faça 3x=k    ==>x=k/3

f(k)=6*k/3+5 ==>f(k)=2k+5

Faça k=x  ==>f(x)=2x+5

b)

f(5)=2*5+5 = 15