Question

Dada a função f( x) = x² - 5 calcule .. f(3) - f (2) ?

Answer 1

Resposta:

$f(x) = {x}^{2} - 5 \\ f(3) = {3}^{2} - 5 = 9 - 5 = 4 \\ f(2) = {2}^{2} - 5 = 4 - 5 = - 1 \\ \\ f(3) - f(2) = 4 - ( - 1) = 4 + 1 = 5$