Question

Seja a função f(x)=x²+6x-4, verifique as igualdades. f(1)=3 e f(3)=23.

Answer 1

Olá,

• f (1) = 3:

$\tt \: f(1) = {1}^{2} + 6(1) - 4 \\ \tt \: f(1) = 1 + 6 - 4 \\ \tt \: f(1) = 7 - 4 \\ \tt \: f(1) = 3 \: \checkmark$

• f (3) = 23:

$\tt \: f(3) = {3}^{2} + 6(3) - 4 \\ \tt \: f(3) = 9 + 18 - 4 \\ \tt \: f(3) = 27 - 4 \\ \tt \: f(3) = 23 \: \checkmark$