Quiz about Fungsi Kuadrat

Question 1

Manakah berikut ini yang merupakan fungsi kuadrat?

Accepted Answer

$$f\left(x\right)\ =x^2\ -\ 3x\ +\ 3$$

Answer

$$f\left(x\right)\ =5$$

Answer

$$f\left(x\right)\ =\ 2x\ +\ 1$$

Answer

$$f\left(x\right)=x^3-3x^2+3x\ -\ 1$$

Question 2

Diketahui fungsi $$f\left(x\right)\ =x^2-4x+3$$ . Titik $$\left(b,8\right)$$ adalah salah satu titik yang dilalui $$f\left(x\right)$$ maka nilai b yang mungkin memenuhi adalah....

Accepted Answer

-1

Answer

0

Answer

1

Answer

2

Question 3

Koordinat titik potong $$f\left(x\right)\ =\ x^2\ +\ 3x-18$$ terhadap sumbu-X adalah...

Accepted Answer

$$\left(-3,0\right)\ \ dan\ \left(6,0\right)$$

Answer

$$\left(0,-3\right)\ dan\ \left(0,-6\right)$$

Answer

$$\left(3,0\right)\ \ dan\ \left(6,0\right)$$

Answer

$$\left(3,0\right)\ dan\ \ \left(-6,0\right)$$

Question 4

Grafik $$y=a^2-5a\ +\ 25$$ memotong sumbu-Y pada titik....

Accepted Answer

$$\left(0,25\right)$$

Answer

$$\left(-25,0\right)$$

Answer

$$\left(0,\ -25\right)$$

Answer

$$\left(25,0\right)$$

Question 5

Perhatikan gambar! Jika grafik diperpanjang dan x = 3 maka ordinatnya adalah...

Accepted Answer

16

Answer

14

Answer

20

Answer

25

Question 6

Sumbu simetri grafik $$y\ =\ x^2-2x\ -\ 15$$ adalah....

Accepted Answer

$$x=2$$

Answer

$$x=-2$$

Answer

$$x=2\ \frac{1}{2}$$

Answer

$$x=5$$

Question 7

Nilai optimum dari grafik $$y\ =-2x^2+x-3$$ adalah....

Accepted Answer

$$y=\frac{25}{8}$$

Answer

$$y=-\frac{25}{8}$$

Answer

$$y=-\frac{21}{8}$$

Answer

$$y=\frac{21}{8}$$

Question 8

Titik balik fungsi $$f\left(x\right)=2x^2+5x-3$$ adalah....

Accepted Answer

$$\left(-\frac{5}{4},-\frac{49}{8}\right)$$

Answer

$$\left(-\frac{5}{4},-\frac{49}{4}\right)$$

Answer

$$\left(-\frac{5}{2},-\frac{36}{8}\right)$$

Answer

$$\left(-\frac{5}{2},-\frac{49}{8}\right)$$

Question 9

Perhatikan gambar! Persamaan fungsi kuadrat pada grafik tersebut adalah....

Accepted Answer

$$f\left(x\right)=x^2+8x+15$$

Answer

$$f\left(x\right)=x^2-2x+15$$

Answer

$$f\left(x\right)=x^2-2x-15$$

Answer

$$f\left(x\right)=x^2-8x-15$$

Question 10

Persamaan fungsi kuadrat yang ditampilkan pada gambar adalah....

Accepted Answer

$$f\left(x\right)=-x^2-2x+8$$

Answer

$$f\left(x\right)=-x^2-2x-8$$

Answer

$$f\left(x\right)=x^2-2x-8$$

Answer

$$f\left(x\right)=x^2+2x+8$$

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