
PARABOLA
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Mathematics
8th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quali sono, se esistono, le intersezioni di una parabola con l'asse x e come si trovano?
Le intersezioni si trovano sostituendo 0 al posto di y e risolvendo @@0=ax^2+bx+c@@
Le intersezioni si trovano sostituendo 0 al posto di x e risolvendo @@0=ay^2+by+c@@
Le intersezioni si trovano calcolando il valore di @@rac{-b}{2a}@@
Le intersezioni si trovano utilizzando la formula @@x_{1,2}=rac{-b ext{±} ext{sqrt}( ext{Δ})}{2a}@@, dove @@ ext{Δ}=b^2-4ac@@.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è l'equazione generica di una parabola?
@@y=ax^2+bx+c@@
@@y=bx+c@@
@@y=ax^3+bx^2+c@@
@@y=rac{1}{2}x^2+3x+4@@
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quanti punti servono per disegnare una parabola?
Due punti.
Almeno tre punti.
Quattro punti.
Un punto.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è l'equazione di una parabola che passa per l'origine degli assi?
@@y=ax^{2}+bx@@
@@y=ax^{2}@@
@@y=bx+c@@
@@y=a(x-h)^{2}+k@@
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quali sono le coordinate del vertice di una parabola?
V\left(-\frac{b}{2a};-\frac{\Delta}{4a}\right) con \Delta=b^2-4ac
V(0;0)
V(1;1)
V(2;2)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
@@y=ax^2+c@@
@@y=-ax^2+c@@
@@y=c@@
@@y=rac{1}{2}x^2@@
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quali sono le intersezioni con gli assi della parabola @@y=x^2-4@@?
asse x : (2;0) (−2;0) e asse y: (0;−4)
asse x : (1;0) (−1;0) e asse y: (0;−3)
asse x : (3;0) (−3;0) e asse y: (0;−5)
asse x : (4;0) (−4;0) e asse y: (0;−2)
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