Question

03. Dada a função f: R+ R tal que f(x) = 5 - x, f(3)
vale
A) 1
B) 2
C) 3
D) 4
E) 5
​

Answer 1

$f(x)=5-x\\f(3)=5-3\\f(3)=2$

Gabarito: B)