Resposta :
Resposta
Inicialmente calcula-se a raiz de cada função.
f(x) = x + 1
x + 1 = 0
x = -1
_----___-1__++++______
f(x) = x - 1
x - 1 = 0
x = 1
__----____1_++++______
f(x) = x - 3
x - 3 = 0
x = 3
___---_3_+++______
_-----____-1__+++++_____________
_-----__________1_+++++________
_-----_______________3_+++++___
_________-1_____1____3_+++++___
S = {x ∈ R / x > 3}
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