Question

data a função y=-2x+1 determine a) f(2)+(0) b)f(5)-f(3)

Answer 1

y = - 2x + 1

a) f(2) + (0)

f(x) = - 2x + 1
f(2) = - 2*2 + 1
f(2) = - 4 + 1
f(2) = - 3

f(0) = - 2*0 + 1
f(0) = 1

f(2) + (0)
  - 3 + 1
    - 2

b) f(5) - f(3)
   
f(x) = - 2x + 1
f(5) = -2*5 + 1
f(5) = -10 + 1
f(5) = -9

f(x) = - 2x + 1
f(3) = - 2*3 + 1
f(3) = -6 + 1
f(3) = -5

f(5) - f(3)
-9 - (-5)
- 9 + 5
    -4