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thaisaleal
@thaisaleal
July 2022
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Estude o sinal da função: y=2x+3
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joyymat
Estude o sinal da função: y=2x+3
y > 0 ==> 2x + 3 > 0 ==> 2x > -3 ==> x > - 3/2 crescente
y = 0 ==> 2x + 3 = 0 ==> 2x = -3 ==> x = - 3/2 constante
y < 0 ==> 2x + 3< 0 ==> 2x< -3 ==> x < - 3/2 decrescente
5 votes
Thanks 10
3478elc
Verified answer
P/x=0 p/y=0
2(0)+3 2x+3=0
0+3 2x=-3
3 x=3/2
sinal da função
x>3/2 x<3/2
y>0 y<0
15 votes
Thanks 15
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Lista de comentários
Estude o sinal da função: y=2x+3
y > 0 ==> 2x + 3 > 0 ==> 2x > -3 ==> x > - 3/2 crescente
y = 0 ==> 2x + 3 = 0 ==> 2x = -3 ==> x = - 3/2 constante
y < 0 ==> 2x + 3< 0 ==> 2x< -3 ==> x < - 3/2 decrescente
Verified answer
P/x=0 p/y=02(0)+3 2x+3=0
0+3 2x=-3
3 x=3/2
sinal da função
x>3/2 x<3/2
y>0 y<0