Question

dada a função f (x)= 3x-4, calcule : f(1/3)

Answer 1

x = 1/3

 f(1/3) = 3.  1     - 4
                 ----  
                   3

f(1/3) = 3/3 - 4

f(1/3) = 1 - 4

f(1/3) = - 3

Answer 2

f(x) = 3x - 4
f(1/3) = 3 . 1/3 - 4
f (1/3) = 3/3 - 4
f (1/3) = 1 - 4
f (1/3) = -3