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Math online olimpiada (TDIUAL) RU 2-kurs

Authored by Xursanali Egamov

Mathematics

10th - 11th Grade

Used 11+ times

Math online olimpiada (TDIUAL) RU 2-kurs
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20 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Вычислите:  2sinα+sin2α2sinαsin2α\frac{2\sin\alpha+\sin2\alpha}{2\sin\alpha-\sin2\alpha}  ,если  cosα=15\cos\alpha=\frac{1}{5}  

 12\frac{1}{2}  

 1 121\ \frac{1}{2}  

 2 122\ \frac{1}{2}  

 34\frac{3}{4}  

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

Упростите выражение:

14a\frac{1}{4}a

4a4a

ayay

14a5y\frac{1}{4}a^5y

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 2x27x+10=12^{x^2-7x+10}=1  Найдите сумму корней уравнения:  

7

3

-3

-7

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 y=x1x+1y=\sqrt{\frac{x-1}{x+1}}  Найдите область определения функции :

Media Image
Media Image
Media Image
Media Image

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 log3(53x)log330\log_3\left(5-3x\right)-\log_33\le0  Укажите целое решение неравенства: 

4

0

1

2

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 5sin2 3π43cos2 π3+tgπ5\sin^2\ \frac{3\pi}{4}-3\cos^2\ \frac{\pi}{3}+tg\pi  Найдите значение выражения;

2,5

1,25

1,75

1,5

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 2 cosx1=0\sqrt{2\ }\cos x-1=0  Решите уравнение: 

 ±π4+πn,nZ\pm\frac{\pi}{4}+\pi n,n\in Z  

 π4+2πn,nZ\frac{\pi}{4}+2\pi n,n\in Z  

 ±π4+2πn,nZ\pm\frac{\pi}{4}+2\pi n,n\in Z  

 π4+2πn,nZ-\frac{\pi}{4}+2\pi n,n\in Z  

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