Matematika

Matematika. 7 sinf. Test savollari. II - chorak
II – variant
1. Hisoblang: .
A) 4 B) 2 C) D) .
2. Hisoblang: .
A) 1 B)16 C) 4 D) 256
3. n ning qanday qiymatida tenglik to`g`rib o`ladi: (7³)ⁿ = 7¹⁵.
A) 1 B) 7 C) 5 D) 12
4. Birhadning son qiymatini toping: , bunda m = 3, n = -35.
A) -7 B) -1 C) 7 D) 9
5. Birhadlarni ko`paytiring: .
A) -28a⁶b⁶c⁸ B) -14 a⁵b⁷c⁷ C) - a⁶b⁶c⁸ D) -21 a⁶b¹⁰c¹²
6. Ko`phadning son qiymatini toping: x² - 2xy +y², bunda x = y = 1,1.
A) 1,331 B) 0 C) 1 D) 1,21
7. Ko`phadni standart shaklga keltiring: .
A) B) C) 2x²y D) 2x²y + a²b
8. Agar P = 7p² – 5q³, Q = 6p² – 5q³ bo`lsa, P – Q ifoda nimaga teng ?
A) p² – 10q³ B) 13p² + 10q³ C) -10q³ D) p²
9. Algebraik ifodaning qiymatini toping:
4ab(3a² – b²) + 3ab(b²- 4a²), bunda a = -5, b = 10.
A) 5000 B) -5000 C) -2500 D) 2500
10. Ko`phadlarni ko`paytiring: (4x + 7y) (16x² – 28xy + 49y²).
A) 64x³ + 56xy – 56x²y + 243y³ B) 64x³ + 343y³
C) 16x³ + 28x²y – 28x²y + 343y³ D) 64x³ –128x²y² + 343y³
11. Ifodani soddalashtiring: (5a³ – 8a²) : a² + (15a² + 24a) : (3a).
A) 25a + 16b B) 5a + 16b C) 10a D) 16b
12. Hisoblang: .
A) B) C) 16 D) 4
13. Hisoblang:
A) ab² B) a³b⁶ C) a² b⁴ D)
14. Ko`phadlarni ko`paytiring: (a² –b²)(a² + b²)(a⁴ + b⁴).
A) a⁶ – b⁶ B) a⁸ – b⁸ C) a⁶ – b⁸ D) a⁸ + b⁶
15. Ifodani soddalashtiring: (32a⁴ + 12a²) : 4a² – 3a(3a + ).
A) a² B) 23a² -3a - C) - a² D) - a² + 6
16. Bo`lishni bajaring: ( 28a³b² - 20a²b³ +a²b² ) : (4a²b²).
A) 7a + 5b + B) 7a +5b +4 C) 7ab – 4 D) 7a - 5b +
17. Hisoblang: .
A) B) 41 C) D) 1681
18. To`g`ri chiziqqa unda yotmagan nuqta orqali nechta parallel to`g`ri chiziq o`tkazish mumkin ?
A) istalgancha B) 1 C) 2 D) 4
19. Ikki to`g`ri chiziqning kesishishidan hosil bo`lgan burchaklardan ikkitasining yig`indisi 100⁰. Bu burchaklarni toping.
A) 25⁰ , 75⁰ B) 40⁰ , 60⁰ C) 50⁰ , 50⁰ D) 45⁰, 55⁰
20. Teng yonli uchburchakning asosi yon tomonidan 5 birlikka ortiq, perimetri 50 ga teng bo`lsa uchburchakning yon tomonini toping.
A) 20 B) 10 C) 12 D) 15
21. Teng yonli uchburchakning perimetri 60, yon tomoni 22 ga teng. Uning asosini toping.
A) 16 B) 18 C) 12 D) 14
22. Uchburchakning ikki tomoni o`rtalarini tutashtiruvchi kesma nima deb ataladi ?
A) balandlik B) o`rta chiziq C) bissektrisa D) mediana
23. Uchburchakning bir uchidan chiqib shu uchdagi burchakni teng ikkiga bo`luvchi kesma nima deb ataladi ?
A) balandlik B) o`rta chiziq C) bissektrisa D) mediana
24. Teng yonli uchburchakning perimetri 64 ga teng. Uning tomonlaridan biri 16 ga teng bo`lsa, qolgan tomonlarini toping.
A) 18; 18 B) 16; 16 C) 18; 24 D) 24; 24
25. Teng yonli uchburchakning perimetri 48 ga, tomonlaridan biri esa 18 ga teng. Uchburchakning qolgan ikki tomonining uzunliklarini toping.
A) 15 va 15 yoki 18 va 12 B) 15 va 15 C) 18 va 12 D) bunday uchburchak mavjud emas