1. Qavslarni oching va soddalashtiring : 7x –

TEST-2 21.11.2021
1. Qavslarni oching va soddalashtiring : 7x – (3y + 2x) – (-2y-5x)

A) 10x – y B) -10x + y D) – y E) – 10x – 5y

2. 2 – x – x ² ≥ 0 tengsizlikning eng katta butun yechimini toping.

A) 1 B) 2 C) -1 D) -2

3. Arifmetik progressiyaning uchinchi hadi 8ga, 4-chi hadi 5ga va dastlabki bir nechta hadlari yig`indisi 28 ga teng Yig`indida necha had qatnashgan?

A) 10 B) 11 C) 9 D) 8

4. Soddalashtiring:

A) 9ab² B) 3ab² C)3ab D)3a²b

5. y = x² – 2x + 5 parabolani nollarini toping.

A) (-1;0) va (5;0) B) (1;0) va (5;0) D) (1;0) va (-5;0) E) (-1;0) va (-5;0)

6. Bolalar archa bayramida bir hil sovg’a olishdi. Hamma sovg’alarda jami 76 ta mandarin va 57 ta konfet bo’lgan. Archa bayramida nechta bola qatnashgan va har bir bola nechtadan mandarin va nechtadan konfet olgan?

A)19; 3; 4 B)3; 25; 19 C)57; 1; 1 D)19; 4; 3 E)4; 19; 16

7. Ushbu tengsizlikning tub sonlardan iborat nechta yechimi bor?

A) B) C) D) E)

8. y = 4x – 5 funksiya grafigining koordinata o`qlari bilan kesishish nuqtalarining

koordinatalarini toping.

A) (0;5), (-5/3;0) B) (0;-5), (-5/4;0) C) (0;5), (3/5;0) D) (0,5) , (5/3,0)

9. Ifodani daraja shaklida yozing.

^{A) a2 B) an-1 C) a5n-1 D) a5n}

10. ni hisoblang.

A) B) C) D) E)

11. - = tenglamani yeching.

a) 15 b)14 c)13 d)12

12.Tenglamani yeching. (y-2)(y+3)-(y-2)²=5

a) y=3 b) y=2 c) y=0 d) y=1

13. ni hisoblang.

A) B) C) D) E)

14. Amallarni bajaring; :0,7
a) 1 b)2 c)3 d)4

15.Geometrik progressiyaning dastlabki 6 hadi va 486 bo’lsa, ni hisoblang.

A)200 B)260 C)230 D)250 E)240

16. Ifodani soddalashtirib so`ngra son qiymatini toping. bunda c=1

a) -19 b) c) d) -

17. Agar kamayuvchi 16 ta va ayriluvchi 20 ta ortirilsa, ayirma qanday o’zgaradi?

A)4 ta kamayadi B)36 ta ortadi C)36 ta kamayadi D)4 ta ortadi E)26 ta kamayadi

18. Agar 3a – b = 7 b – c = 5 va 3c – a = 2 bo`lsa a + c ni toping.

A) 7 B) 14 C) 21 D) 28

19. (x,y) sonlar juftligi sistemaning yechimi bo`lsa, y – x ni toping.

A) -2 B) -3 C) 3 D) 2
20. . Tenglamani yeching. (x-3)(x²+3x+9)-x(x+4)(x-4) =21
a) x=0 b) x=1 c) x=2 d) x=3