Question

O valor de f(x) = 2x² – 2 para f(4)-f(-2) é igual a:

Answer 1

Olá

A função é: \begin{gathered} f(x) = -2x^2 + 2x \\ \\ Logo, \\ f(-1) + f(0) + f(1) \\ = [(-2(-1)^2 + 2(-1)] + [(-2.0^2 + 2.0)] + (-2.1^2 + 2.1) \\ = -2.1 -2 -2.0 + 2.0 -2.1 + 2 \\ = -2 -2 + 0 + 0 \cancel{-2} + \cancel{2} \\ = -4 \end{gathered}

f(x)=−2x

2

+2x

Logo,

f(−1)+f(0)+f(1)

=[(−2(−1)

2

+2(−1)]+[(−2.0

2

+2.0)]+(−2.1

2

+2.1)

=−2.1−2−2.0+2.0−2.1+2

=−2−2+0+0

−2

+

2

=−4

Bons estudos!