Question

Dada a função f (×) = 3× - 13 , determine a) f(-7) b) f(4)

Answer 1

$a) \: f( - 7) = 3 \times ( - 7) - 13 = - 21 - 13 = - 34 \\ \\b) \: f(4) = 3 \times 4 - 1 3 = 12 - 13 = - 1$