faça um estudo do sinal da função y= -x²+4
Soluções para a tarefa
Respondido por
19
y = -x² + 4
-x² + 4 = 0
-x² = -4
x² = 4
x = +/- √4
x = +/- 2
y < 0, se x < -2 ou x > 2
y = 0, se x = -2 ou x = 2
y > 0, se -2 < x < 2
-x² + 4 = 0
-x² = -4
x² = 4
x = +/- √4
x = +/- 2
y < 0, se x < -2 ou x > 2
y = 0, se x = -2 ou x = 2
y > 0, se -2 < x < 2
Respondido por
16
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




•
•
•

Tags: estudo do sinal função quadrática segundo grau fatoração produto raízes álgebra
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Tags: estudo do sinal função quadrática segundo grau fatoração produto raízes álgebra
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