Quiz about พาราโบลา ม.2

Question 1

$$จากสมการ\ \ \ y=2x^2-1\ ข้อใดถูกต้อง\ $$

Accepted Answer

$$ค่าต่ำสุด\ \ y=\ -1$$

Answer

$$ค่าสูงสุด\ y=1$$

Answer

$$ค่าต่ำสุด\ \ y\ =\ 1\ $$

Answer

$$ค่าสูงสุด\ \ y=\ -1$$

Question 2

$$จากสมการ\ y\ =\ -6x^2+4\ ข้อใดถูกต้อง$$

Accepted Answer

$$จุดสูงสุด\ \left(\ 0\ ,\ 4\right)$$

Answer

$$จุดสูงสุด\ \left(-6,\ 4\ \right)$$

Answer

$$จุดต่ำสุด\ \left(\ -6\ ,\ 4\right)$$

Answer

$$จุดต่ำสุด\ \left(\ 0\ ,\ 4\right)$$

Question 3

$$สมการพาราโบลาในข้อใดที่มีจุดต่ำสุด\ \left(\ 6\ ,\ 0\ \right)$$

Accepted Answer

$$y\ \ =\ 3\left(x-6\right)^2$$

Answer

$$y\ \ =\ 3\left(x+6\right)^2$$

Answer

$$y\ \ =\ -3\left(x+6\right)^2$$

Answer

$$y\ \ =\ -3\left(x-6\right)^2$$

Question 4

$$จากสมการ\ -3\left(x-4\right)^2+5\ ข้อใดถูกต้อง$$

Accepted Answer

a = -3

h = 4

k = 5

Answer

a = -3

h = -4

k = -5

Answer

a = 3

h = 4

k = -5

Answer

a = 3

h = -4

k = -5

Question 5

$$จากสมการ\ 5\left(x+7\right)^2-9\ ข้อใดถูกต้อง$$

Accepted Answer

a = 5

h = -7

k = -9

Answer

a = 5

h = 7

k = -9

Answer

a = -5

h = -7

k = 9

Answer

a = - 5

h = 7

k = -9

Question 6

$$สมการในข้อใด\ มีแกน\ x\ =\ 3$$

Accepted Answer

$$y=\ -\frac{1}{2}\left(x-3\right)^2+5$$

Answer

$$y\ \ =\ \left(x+3\right)^2+4$$

Answer

$$y\ =\ -3\left(x+7\right)^2+3$$

Answer

$$y\ =\ 3\left(x-5\right)^2-3$$

Question 7

$$สมการในข้อใดมี\ \left(\ 2\ ,\ -5\ \right)\ เป็นจุดสูงสุด$$

Accepted Answer

$$y\ =\ -4\left(x-2\right)^2-5$$

Answer

$$y\ =\ 4\left(x-2\right)^2-5$$

Answer

$$y\ =\ 4\left(x+2\right)^2+5$$

Answer

$$y\ =\ -4\left(x+2\right)^2+5$$

Question 8

$$สมการในข้อใดมี\ \left(\ -6\ ,\ 1\right)\ เป็นจุดต่ำสุด$$

Accepted Answer

$$y\ =\ \left(x+6\right)^2+1$$

Answer

$$y\ =\ \left(x-6\right)+1$$

Answer

$$y\ =\ -\left(x-6\right)^2+1$$

Answer

$$y\ =\ -\left(x+6\right)^2+1$$

Question 9

$$สมการในข้อใดมีค่าสูงสุด\ y\ =\ 4$$

Accepted Answer

$$y\ =\ -3\left(x+1\right)^2+4$$

Answer

$$y\ =\ 3\left(x+1\right)^2+4$$

Answer

$$y\ \ =\ -3\left(x-4\right)^2+1$$

Answer

$$y\ =\ 3\left(x+4\right)^2+1$$

Question 10

$$สมการในข้อใดมีค่าต่ำสุด\ y\ =\ -1$$

Accepted Answer

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

Answer

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

Answer

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

Answer

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

พาราโบลา ม.2

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