Question

Para a função F (x) = 3x - 4. Calcular
a) F (5)
b) F (-7)
c) F (2)
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3

Answer 1

a)

$f(5) = (3 \cdot5) - 4 = 11$

b)

$f( - 7) = ( 3 \cdot - 7) - 4 = -25$

c)

$f \bigg( \dfrac{2}{3} \bigg) = \bigg(3 \cdot \dfrac{2}{3} \bigg) - 4 = 2 - 4 = - 2$