Quiz about PTS MATEMATIKA KELAS 9

Question 1

$$-5^4$$ artinya adalah .....

Accepted Answer

$$-\left(5\cdot5\cdot5\cdot5\right)$$

Answer

$$\left(-5\right)\cdot\left(-5\right)\cdot\left(-5\right)\cdot\left(-5\right)$$

Answer

$$\left(-4\right)\cdot\left(-4\right)\cdot\left(-4\right)\cdot\left(-4\right)\cdot\left(-4\right)$$

Answer

$$5\cdot5\cdot5\cdot5$$

Question 2

Nilai dari $$3^{-3}$$ adalah .....

Accepted Answer

$$\frac{1}{27}$$

Answer

$$27$$

Answer

$$-27$$

Answer

$$-\frac{1}{27}$$

Question 3

Nilai dari $$64^{\frac{2}{3}}-125^{\frac{1}{3}}+32^{\frac{1}{5}}$$ adalah .....

Accepted Answer

13

Answer

7

Answer

9

Answer

11

Question 4

Bentuk baku dari 745.000 adalah

Accepted Answer

$$7,45\cdot10^5$$

Answer

$$745\cdot10^3$$

Answer

$$74,5\cdot10^4$$

Answer

$$0,745\cdot10^{-5}$$

Question 5

Jika $$p^{\frac{2}{7}}$$ ditulis dalam bentuk akar adalah .....

Accepted Answer

$$\sqrt[7]{p^2}$$

Answer

$$\sqrt[2]{p^7}$$

Answer

$$\sqrt[7]{p}$$

Answer

$$\sqrt[]{p^{\frac{2}{7}}}$$

Question 6

Bentuk sederhana dari $$\left(\frac{2x^{-1}y^2z^{-2}}{4xy^{-3}z^2}\right)^{-2}$$

Accepted Answer

$$\frac{4x^4z^8}{y^{10}}$$

Answer

$$\frac{2x^4z^8}{y^{10}}$$

Answer

$$\frac{4x^4z^8}{y^8}$$

Answer

$$\frac{2x^2z^4}{y^5}$$

Question 7

Nilai x dari $$3^{\left(-2x+4\right)}=729$$

Accepted Answer

x = -1

Answer

x = 6

Answer

x = 5

Answer

x = 0

Question 8

Bentuk rasional dari $$\frac{2}{\sqrt[]{3}}$$ adalah .....

Accepted Answer

$$\frac{2}{3}\sqrt[]{3}$$

Answer

$$\sqrt[]{2}$$

Answer

$$\frac{1}{\sqrt[]{3}}$$

Answer

$$\frac{3}{2}\sqrt[]{3}$$

Question 9

$$\sqrt[]{72}+\sqrt[]{50}\cdot\sqrt[]{288}-\sqrt[]{200}$$

Accepted Answer

$$-4\sqrt[]{2}+120$$

Answer

$$4\sqrt[]{2}+60$$

Answer

$$4\sqrt[]{2}+120$$

Answer

$$-4\sqrt[]{2}+60$$

Question 10

Hasil dari $$\sqrt[]{20\sqrt[]{20\sqrt[]{20\sqrt[]{20\sqrt[]{......}}}}}$$ adalah

Accepted Answer

20

Answer

5

Answer

4

Answer

0

Question 11

Bentuk sederhana dari $$\sqrt[]{7+2\sqrt[]{12}}$$ adalah ......

Accepted Answer

$$2+\sqrt[]{3}$$

Answer

$$\sqrt[]{5}+\sqrt[]{2}$$

Answer

$$2\ \sqrt[]{3}+1$$

Answer

$$\sqrt[]{6}+\sqrt[]{2}$$

Question 12

Bentuk $$\frac{3\sqrt[]{3}+\sqrt[]{7}}{\sqrt[]{7}-2\sqrt[]{3}}$$ dapat disederhanakan menjadi ......

Accepted Answer

$$-5-\sqrt[]{21}$$

Answer

$$5-\sqrt[]{21}$$

Answer

$$5+\sqrt[]{21}$$

Answer

$$\sqrt[]{21}-5$$

Question 13

Bentuk umum dari persamaan kuadrat adalah .....

Accepted Answer

$$ax^2+bx+c=0,a e0$$

Answer

$$ax^2-bx-c=0,a e0$$

Answer

$$ax^2-bx+c=0,a e0$$

Answer

$$ax^2+bx-c=0,a e0$$

Question 14

Faktor dari $$x^2-x-12=0$$ adalah ......

Accepted Answer

$$\left(x-4\right)\left(x+3\right)$$

Answer

$$\left(x+4\right)\left(x+3\right)$$

Answer

$$\left(x-4\right)\left(x-3\right)$$

Answer

$$\left(x+4\right)\left(x-3\right)$$

Question 15

Akar - akar persamaan kuadrat dari $$x^2+2x-15=0$$

Accepted Answer

x = -5 dan x = 3

Answer

x = 5 dan x = 3

Answer

x = 5 dan x = -3

Answer

x = -5 dan x = -3

Question 16

Persamaan berikut yang tidak mempunyai akar - akar yang nyata adalah ......

Accepted Answer

$$x^2+5x+7=0$$

Answer

$$4x^2+9x-12=0$$

Answer

$$x^2-x-1=0$$

Answer

$$-2x^2-5x+1=0$$

Question 17

Diketahui persamaan kuadrat $$x^2+\left(a-3\right)x+9=0$$ . Nilai a yang menyebabkan persamaan kuadrat tersebut mempunyai akar - akar yang kembar ......

Accepted Answer

a = 9 atau a = -3

Answer

a = 6 atau a = -6

Answer

a = 6 atau a = 3

Answer

a = -6 atau a = -3

Question 18

Persamaan kuadrat $$x^2-8x+4=0$$ mempunyai akar - akar $$\alpha\ dan\ \beta$$ . Nilai dari $$\alpha^2\beta+\alpha\beta^2$$ adalah .....

Accepted Answer

32

Answer

64

Answer

16

Answer

8

Question 19

Persamaan kuadrat yang mempunyai akar - akar $$\left(1-\sqrt[]{3}\right)\ dan\ \left(1+\sqrt[]{3}\right)$$

Accepted Answer

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

Answer

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

Answer

$$2x^2+2x-1=0$$

Answer

$$2x^2-2x-1=0$$

Question 20

Persamaan kuadrat yang akar-akarnya satu kurangnya dari dua kali akar-akar persamaan kuadrat $$x^2+3x+7=0$$

Accepted Answer

$$x^2+8x+35=0$$

Answer

$$x^2-4x+23=0$$

Answer

$$x^2-8x+35=0$$

Answer

$$x^2+12x+23=0$$

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