
Revisão de matemática
Quiz
•
Mathematics
•
1st Grade
•
Practice Problem
•
Hard
Hysvia Brito
Used 1+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que é uma função de 2º grau?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Exemplo de função de 2º grau em que a parábola é voltada para BAIXO
f(x) = -2x² - 3x + 5
f(x) = 3x² + 4x - 2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O gráfico abaixo representa uma concavidade voltada para cima, pois:
a>0
a<0
a=0
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sendo delta igual a zero, pode-se afirmar que:
a parábola toca o eixo x em dois pontos
a parábola toca o eixo x em um único ponto
a parábola não toca o eixo x
a parábola toca o eixo y
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
sendo a função quadrática f(x) = 2x^2 - 3x + 1, determine os coeficientes a, b e c.
a= -2
b= -3
c= 0
a=2
b= 3
c= 0
a= 2
b= -3
c= 1
a=3
b= -3
c= 1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quando a parábola não toca o eixo x, pode-se afirmar que delta:
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Uma função quadrática f é dada por f(x)= x^2 - 4.x + 2, então o valor de f(- 1) é: (Substitua x pelo valor que está entre parêntese)
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