Mathematics, 03.11.2020 21:00 infoneetusinghoyg22o

Estude a variação do sinal das seguintes funções do 1º grau: a)f(x)=-3x
b)f(x)=2-3x
c)f(x)=2x+5
d)f(x)=-3x+6
e)f(x)=1-5x

Pfv eu preciso urgente de ajuda

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Estude a variação do sinal das seguintes funções do 1º grau: a)f(x)=-3x
b)f(x)=2-3x
c)f...