
Função Quadrática e Equações do 2º Grau
Authored by Lurdes Alves
Mathematics
10th Grade
20 Questions

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a concavidade de uma parábola com a equação y = 2x^2 - 4x + 1?
Côncava para baixo
Côncava para a direita
Côncava para cima
Côncava para a esquerda
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolva a equação quadrática 3x^2 + 5x - 2 = 0.
As raízes da equação são x = 0.333 e x = -2.
x = 2 e x = -1.5
x = 0.5 e x = -3
x = 1.5 e x = -1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Encontre as raízes da função quadrática f(x) = x^2 - 6x + 9.
x = 5
x = 3
x = 4
x = 2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que representa o vértice da parábola y = -x^2 + 4x - 3?
(4, 0)
(3, -1)
(1, -3)
(2, -2)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolva a inequação quadrática 2x^2 - 3x < 5.
(3 + √49) / 4 < x < (3 - √49) / 4
x < (3 - √49) / 4
x > (3 + √49) / 4
x < (3 + √49) / 4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Analise o gráfico da função quadrática y = -2x^2 + 4x + 1.
Uma parábola que abre para cima, com vértice no ponto (0,1).
Uma reta decrescente com inclinação de -2.
Uma parábola que abre para baixo, com vértice no ponto (1,3).
Uma parábola que abre para cima, com vértice no ponto (3,1).
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Como determinar se uma parábola abre para cima ou para baixo?
Verificar o sinal do coeficiente do termo linear da equação da parábola
Verificar o sinal do coeficiente do termo quadrático da equação da parábola.
Analisar o vértice da parábola
Contar o número de raízes da equação da parábola
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