Quiz about PTS 1 matematika kelas 11

Question 1

cari akar persamaan kuadrat berikut

$$x^2-3x-28=0$$

Accepted Answer

$$x=-4\ atau\ x=7$$

Answer

$$x=2\ atau\ x=1$$

Answer

$$x=4\ atau\ x=-3$$

Answer

$$x=3\ atau\ x=7$$

Question 2

cari akar dari persamaan kuadrat berikut

$$x^2-7x-8=0$$

Accepted Answer

x = 8, x = -1

Answer

x = 7, x = 1

Answer

x = 4, x = -2

Answer

x = 0, x = 8

Question 3

cari akar dari persamaan kuadrat berikut

$$x^2+3x-4=0$$

Accepted Answer

x = 1, x = -4

Answer

x = 3, x = -1

Answer

x = 2, x = -2

Answer

x = 0, x = -4

Question 4

berikut yang merupakan rumus diskriminan adalah....

Accepted Answer

D = b²- 4ac

Answer

D = b² - 2ac

Answer

D = 2b + 4ac

Answer

D = b²+ 4ac

Question 5

berikut jenis akar persamaan kuadrat berdasarkan nilai Diskriminan adalah......

Accepted Answer

D > 0 : dua akar real berbeda

D = 0 : satu akar real

D < 0: tidak ada akar real.

Answer

D > 0: satu akar real; D = 0: dua akar real berbeda; D < 0: satu akar imajiner.

Answer

D > 0: tidak ada akar real; D = 0: dua akar real; D < 0: satu akar real.

Answer

D > 0: dua akar imajiner; D = 0: dua akar real; D < 0: satu akar real.

Question 6

tentukan nilai $$D$$ dari persamaan kuadrat berikut

$$x^2+x+3=0$$

Accepted Answer

-11

Answer

-5

Answer

0

Answer

2

Question 7

tentukan nilai $$D$$ dari persamaan kuadrat berikut

$$x^2-2x-35=0$$

Accepted Answer

144

Answer

36

Answer

64

Answer

100

Question 8

tentukan nilai $$D$$ dari persamaan kuadrat berikut

$$x^2+10x+25=0$$

Accepted Answer

0

Answer

-10

Answer

5

Answer

25

Question 9

berikut yang merupakan rumus menyusun persamaan kuadrat yang diketahui akar-akarnya......

Accepted Answer

$$x^2-\left(x_1+x_2\right)x+x_1x_2=0$$

Answer

$$x_1+x_2=0$$

Answer

$$x^2-x_1x_2=0$$

Answer

$$x^2+x_1x_2 imes x=0$$

Question 10

tentukan persamaan kuadrat yang akar nya 3 dan 4

Accepted Answer

x² - 7x + 12 = 0

Answer

x² - 5x + 6 = 0

Answer

x² - 6x + 9 = 0

Answer

x² - 8x + 15 = 0

Question 11

tentukan persamaan kuadrat yang nilai akar akarnya -8 dan 3

Accepted Answer

x²+ 5x - 24 = 0

Answer

x²+ 8x - 24 = 0

Answer

x² - 5x + 24 = 0

Answer

x² - 3x - 24 = 0

Question 12

tentukan persamaan kuadrat yang akar nya -2 dan 5

Accepted Answer

x²- 3x - 10 = 0

Answer

x² + 5x + 10 = 0

Answer

x² - 7x + 10 = 0

Answer

x² + 3x - 10 = 0

Question 13

operasi aljabar fungsi adalah.....

Accepted Answer

Proses matematis yang melibatkan penjumlahan, pengurangan, perkalian, atau pembagian fungsi.

Answer

Hanya melibatkan penjumlahan dan pengurangan fungsi.

Answer

Proses yang hanya berkaitan dengan grafik fungsi.

Answer

Metode untuk menggambar fungsi tanpa operasi matematis.

Question 14

diketahui

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

tentukan hasil operasi $$\left(f+g\right)x$$

Accepted Answer

$$x^2+x-2$$

Answer

$$x^2+x+2$$

Answer

$$x^2+x-3$$

Answer

$$x^2+4x$$

Question 15

diketahui

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

tentukan hasil operasi $$\left(f-g\right)x$$

Accepted Answer

$$x^2-x-6$$

Answer

$$x^2+6-2$$

Answer

$$x^2-2x$$

Answer

$$x^2+2+4$$

Question 16

diketahui

$$f\left(x\right)=x^2+3\ dan\ g\left(x\right)=2x+5$$

tentukan hasil operasi $$\left(f+g\right)x$$

Accepted Answer

$$x^2+2x+8$$

Answer

$$x^2+x+2$$

Answer

$$x^2-8$$

Answer

$$x^2+2x+4$$

Question 17

diketahui

$$f\left(x\right)=2x^2-4x\ dan\ g\left(x\right)=x-2$$

tentukan hasil operasi $$\left(f.\ g\right)x$$

Accepted Answer

$$2x^3-8x^2-8x$$

Answer

$$2x^2+3x+4$$

Answer

$$2x^3-2x^2-8$$

Answer

$$2x^2-8x-4$$

Question 18

diketahui

$$f\left(x\right)=2x^2-4x\ dan\ g\left(x\right)=x-2$$

tentukan hasil operasi $$\left(\frac{f}{g}\right)x$$

Accepted Answer

$$2x$$

Answer

$$2x^2-3$$

Answer

$$3x-4$$

Answer

$$3x$$

Question 19

diketahui

$$f\left(x\right)=x^2-9\ dan\ g\left(x\right)=x-3$$

tentukan hasil operasi $$\left(\frac{f}{g}\right)x$$

Accepted Answer

$$x+3$$

Answer

$$x^2+3$$

Answer

$$x^2+2$$

Answer

$$x+5$$

Question 20

berikut salah satu rumus fungsi invers adalah......

Accepted Answer

$$f^{-1}\left(x\right)\ =\frac{x-b}{a}$$

Answer

$$f^{-1}\left(x\right)\ =\frac{x-a}{b}$$

Answer

$$f^{-1}\left(x\right)\ =\frac{a-b}{x}$$

Answer

$$f^{-1}\left(x\right)\ =\frac{x-b}{ab}$$

Question 21

tentukan invers dari fungsi berikut

$$f\left(x\right)=2x-4$$

Accepted Answer

$$f^{-1}(x)=\frac{(x+4)}{2}$$

Answer

$$f^{-1}(x)=\frac{(2+2)}{x}$$

Answer

$$f^{-1}(x)=2x+4$$

Answer

$$f^{-1}(x)=\frac{2x+4}{x}$$

Question 22

tentukan invers dari fungsi berikut

$$f\left(x\right)=3x-5$$

Accepted Answer

$$f^{-1}(x)=\frac{(x+5)}{3}$$

Answer

$$f^{-1}(x)=3x+5$$

Answer

$$f^{-1}(x)=\frac{(x-5)}{3}$$

Answer

$$f^{-1}(x)=3x-5$$

Question 23

tentukan invers dari fungsi berikut

$$f\left(x\right)\ =4x+5$$

Accepted Answer

$$f^{-1}(x)=\frac{(x-5)}{4}$$

Answer

$$f^{-1}(x)=(x-4)+5$$

Answer

$$f^{-1}(x)=\frac{(x-4)}{5}$$

Answer

$$f^{-1}(x)=x-4$$

Question 24

rumus inver fungsi dari rumus berikut

$$f\left(x\right)=\frac{ax+b}{cx+d}$$

Accepted Answer

$$f^{-1}\left(x\right)=\frac{-dx+b}{cx-a}$$

Answer

$$f^{-1}\left(x\right)=\frac{dx+b}{cx-a}$$

Answer

$$f^{-1}\left(x\right)=\frac{-dx+b}{cx+a}$$

Answer

$$f^{-1}\left(x\right)=\frac{-dx-b}{cx+a}$$

Question 25

tentukan invers fungsi dari fungsi berikut

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

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 26

tentukan invers fungsi dari fungsi berikut

$$f\left(x\right)=\frac{2-x}{2x+1}$$

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 27

tentukan invers fungsi dari fungsi berikut

$$f\left(x\right)=\frac{5+3x}{2x+4}$$

Accepted Answer

$$f^{-1}\left(x\right)=\frac{-4x+5}{2x-3}$$

Answer

$$f^{-1}\left(x\right)=\frac{4x+5}{2x-3}$$

Answer

$$f^{-1}\left(x\right)=\frac{-4x+5}{2x+3}$$

Answer

$$f^{-1}\left(x\right)=\frac{-4x-5}{2x-3}$$

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