Question

Si f(x) = 1/2x^2-(1/4x+3),¿cuál es el valor de f(8)?

(3) 27
(2) 17
(4) 33
(1) 11

Answer 1

27

Explanation:

To evaluate f(8) substitute x = 8 into f(x)

f(8) =
`(1)/(2)` × 8² - (
`(1)/(4)` × 8 + 3)

=
`(1)/(2)` × 64 - (2 + 3)

= 32 - 5

= 27