Question

Dado f(x)= x/5 - 1/2 calcule f(2/5) e f(5/2)

Answer 1

    f(2/5) = (2/5)/5 - 1/2
             = 2/25 - 1/2
             = (4 - 25)/50
             = - 21/50

    f(5/2) = (5/2)/5 - 1/2
             = 1/2 - 1/2
             = 0