Question

Sendo as funções f(x) = 3x-2 e g(x) = 2x+5, calcule f(2) - g(1/2):

Answer 1

$f(x) = 3*x -2$

f(2) = substitui x por 2
$f(2) = 3*2 -2\\\\\ f(2) = 6-2 =4$

$g(x) = 2x+5$

g(1/2) = substitui x por 1/2
$g( \frac{1}{2} )=2* \frac{1}{2}+ 5 \\\\g( \frac{1}{2} )= \frac{2}{2}+5 \\\\g( \frac{1}{2} )=1+5 = 6$

calculando
f(2) - g(1/2)
= 4 - 6 = -2