Question

dada funçao f(x) = 2x-1. ache f(3)

Answer 1

$f(x) =2x-1 \\ \\ f(3)=2.3-1 \\ \\ f(3)=6-1 \\ \\ f(3)=5$

Answer 2

f(x) = 2x - 1
f(3) = 2*3 - 1
f(3) = 6 - 1
f(3) = 5