Question

1- Dada a função y= 3x²+5x-8, calcule f(-4)
2- Dada a função y=5x-8, calcule f(2/3)

Answer 1

Olá.

Resolução:

y = 3x² + 5x - 8

f(-4) = 3(-4)² + 5(-4) - 8

f(-4) = 3 • 16 - 20 - 8

f(-4) = 48 - 20 - 8

f(-4) = 28 - 8

f(-4) = 20

______________________

y = 5x + 8

f(2/3) = 5(2/3) + 8

f(2/3) = 10/3 - 8

f(2/3) = 10 - 3 • 8 / 3

f(2/3) = 10 - 24 / 3

f(2/3) = -14 / 3