Question

dada a função f(x) = 1/2x - 3/4, calcule:
f(0) - f(1)
___________  (Fração)
f(2)a) -1
b) 12
c) 1
d) 2
e) N.R.A.

Answer 1

f(x) = ..1....- 3
.........___..._
...........2x....4

calcule : f(0) - f(1)

f(0) :
__

f(x) = ..1....-.. 3
.........___....._
...........2x......4

f(0) = ..1.....- 3
.........___....._
.........2(0).....4

f(0) =...1...-...3
.........___....._
...........0........4

f(0) = 0 - 3
................_
................4

f(0) = - 3
.........___
............4

f(1) :
__

f(x) = ...1....-...3
.........___....___
...........2x.......4

f(1) =...1.......-.....3
..........__..........__
..........2(1)..........4

f(1) = 1....-.....3
........__.....___
........2..........4

m.m.c (2,4) =4

f(1) = 2. - 3
........_____
.............4

f(1) = - 1
.........___
............4

f(2) :
___

f(x) =..1.....-...3
........___....___
........2(2).........4

f(2) = ..1......-....3
.........___......___
...........4............4

f(2) =....1...-....3
........._______
.................4

f(2) = - 2
.........___
............4

vamos s redolver a
_______________
operacao :
_________

f(0) - f (1)
______
......f(2)

..- 3..- (-1)
= __....__
.....4.....(4)
....______
.........-2
.........__
..........4

...- 3...+..1
=______
.........4
...______
..........-2
..........__
...........4

...- 2
=..._
.....4
...___
....-2
....._
.....4

= 2
a resposta e a alternativa C)