Question

31. Dada a função f(x) = -2x (ao quadrado) sobre 3 -2, calcule.
a) f(-1)
b) f(0)
c) f(2)​

Answer 1

Resposta:

a) $\frac{-8}{3} = -\frac{8}{3}$    b)  -2      c) $\frac{-14}{3} = -\frac{14}{3}$  

Explicação passo-a-passo:

$f(x) =\frac{-2x^{2} }{3} - 2 => f(-1) =\frac{-2(-1)^{2} }{3} - 2 =>=\frac{-2.1^{} }{3} - 2 => =\frac{-2^{} }{3} - 2 =>\frac{-2 - 2.3^{} }{3} =>\frac{-2 - 6^{} }{3} =>\frac{-8^{} }{3} => -\frac{8^{} }{3}$

$f(x) =\frac{-2x^{2} }{3} - 2 => f(0) =\frac{-2(0)^{2} }{3} - 2 => f(0) =\frac{0^{} }{3} - 2 => f(0) =0 - 2 =>f(0) = - 2$

$f(x) =\frac{-2x^{2} }{3} - 2 => f(2) =\frac{-2(2)^{2} }{3} - 2 =>=\frac{-2.4^{} }{3} - 2 => =\frac{-8^{} }{3} - 2 =>\frac{-8 - 2.3^{} }{3} =>\frac{-8 - 6^{} }{3} =>\frac{-14^{} }{3} => -\frac{14^{} }{3}$