Question

Conhecendo a função f(x) = -5/2 x determinar :

B : f (-1) e f(2)

Answer 1

$f(x) = \frac{-5x}{2} \\\\ f(-1) = \frac{-5.-1}{2} \\\\ f(-1) = \frac{5}{2} = 2,5 \\\\\\\\ f(2) = \frac{-5.2}{2} \\\\ f(2) = \frac{-10}{2} -5$

Answer 2

f(x) = -1 = -5/2.(-1)= -5/-2 = +5/2
f(x) = 2 = -5/2.2 = -5/4