Question

Dada a funçao f(x)=4x+1 calcule f(3)

Answer 1

f(x) = 4x+1
f(3) = 4 . 3 +1
f(3) = 12 + 1
f(3) = 13

Answer 2

basta substituir x = 3

f(x) = 4x + 1

f(3) = 4.3 + 1
f(3) = 12 + 1
f(3) = 13

R.: f(3) = 13