Free Printable Quiz2:(2h-3h)

1.

សរសេរ $z=1-i\sqrt{3}\$ ជាទម្រង់

ត្រីកោណមាត្រ ។

a)

$z=\cos\frac{\pi}{3}+i\sin\frac{\pi}{3}$

b)

$z=2\left(\cos\frac{\pi}{6}+i\sin\frac{\pi}{6}\right)$

c)

$z=2\left(\cos\frac{2\pi}{3}+i\sin\frac{2\pi}{3}\right)$

d)

$z=2\left(\cos\frac{5\pi}{3}+i\sin\frac{5\pi}{3}\right)$

2.

$បើ\ \ \overrightarrow{U}\left(1,-2,0\right)\ និង\ \overrightarrow{V}\left(2,3,-2\right)\ \ ។\$

គណនា\ \ \overrightarrow{U}\times\overrightarrow{V}\ \ ។

a)

(4,2,-2)

b)

(4,2,7)

c)

(4,-2,7)

d)

(-4,0,1)

3.

a)

1+2+3

b)

8

c)

12

d)

5

4.

a)

$17$

b)

$2\sqrt{5}$

c)

$71$

d)

$21$

5.

$\overrightarrow{U}\ \left(u_1,u_2,u_3\right)\ \ ,\ \ \ \overrightarrow{V}\ \left(v_1,v_2,v_3\right)$ $\ \Longrightarrow\ \overrightarrow{U}\ \times\overrightarrow{V}\ =....?$

a)

$=\left(u_2v_3-u_3v_2\right)\overrightarrow{\ i\ }-\left(u_1v_3-u_3v_1\right)\overrightarrow{\ j\ }+\left(u_1v_2-u_2v_1\right)\overrightarrow{\ k\ }$

b)

$=\left(u_2v_1-u_3v_2\right)\overrightarrow{\ i\ }-\left(u_1v_3-u_2v_1\right)\overrightarrow{\ j\ }+\left(u_1v_2-u_2v_1\right)\overrightarrow{\ k\ }$

c)

$=\left(u_2v_3-u_3v_2\right)\overrightarrow{\ i\ }+\left(u_1v_3-u_3v_1\right)\overrightarrow{\ j\ }-\left(u_1v_2-u_2v_1\right)\overrightarrow{\ k\ }$

d)

$=\left(u_1v_3-u_3v_1\right)\overrightarrow{\ i\ }-\left(u_1v_2-u_2v_1\right)\overrightarrow{\ j\ }+\left(u_1v_2-u_2v_1\right)\overrightarrow{\ k\ }$

6.

. a ជាទទឹងនៃចតុកោណកែង

. b ជាបណ្ដោយនៃចតុកោណកែង

នោះគេបាន៖ ផ្ទៃក្រឡានៃចតុកោណកែងគឺ S=.....?

a)

S=a+b

b)

S=a×b

c)

S=2(a+b)

d)

S=(a+b)²

7.

(a+b)(a²-ab+b²)=....?

a)

a³+ b³

b)

a³- b³

c)

(a + b)³

d)

(a - b)³

8.

(a-b)(a+b)=....?

a)

a² - b²

b)

a² + b²

c)

(a + b)²

d)

a² × b²

9.

$\frac{2x-1}{3}=7$

a)

x=10

b)

x=11

c)

x=15

d)

x=-6

10.

(a+b+c)²=....?

a)

a²- b²- c²+ 2ab + 2bc + 2ac

b)

a²+ b²+ c²+ 2ab

c)

a²+ b²+ c²- 2ab - 2bc - 2ac

d)

a²+ b²+ c²+ 2ab + 2bc + 2ac

Quiz2:(2h-3h)

Total questions: 10

Worksheet time: 13mins

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