Matematika

Matematika. 7 sinf. Test savollari. II - chorak
I – variant
1. Hisoblang: .
A) 4 B) 2 C) D) .
2. Hisoblang: .
A) 1 B) 25 C) 5 D) 625
3. n ning qanday qiymatida tenglik to`g`rib o`ladi: (4⁴)ⁿ = 4¹².
A) 1 B) 2 C) 3 D) 8
4. Birhadning son qiymatini toping: , bunda y = -15, x = 6.
A) 3 B) -1 C) 12 D) 18
5. Birhadlarni ko`paytiring: .
A) -7,5a⁵b⁷c⁷ B) -21 a⁵b⁷c⁷ C) -7,5a⁶b¹⁰c¹² D) -21 a⁶b¹⁰c¹²
6. Ko`phadning son qiymatini toping: x² +2xy +y², bunda x = 1,2, y = -1,2.
A) 1,5676 B) 0 C) 1 D) 5,76
7. Ko`phadni standart shaklga keltiring: .
A) B) C) 2x²y D) 2x²y + 1
8. Agar P = 2p² – 3q³, Q = 2p² – 4q³ bo`lsa, P – Q ifoda nimaga teng ?
A) 4p² – 7q³ B) 4p² + 7q³ C) 2p² + q³ D) q³
9. Algebraik ifodaning qiymatini toping:
3ab(4a² – b²) + 4ab(b²- 3a²), bunda a = 10, b = -5.
A) -1250 B) -50 C) 0 D) 250
10. Ko`phadlarni ko`paytiring: (5x + 3y) (25x² – 15xy + 9y²).
A) 125x³ + 90xy – 45x²y + 27y³ B) 125x³ + 27y³
C) 125x³ + 45x²y – 45x²y + 27y³ D) 125x³ – 120x²y² + 27y³
11. Ifodani soddalashtiring: (6a³ – 3a²) : a² + (12a² + 9a) : (3a).
A) 10a + 6b B) 2a C) 10a D) 6b
12. Hisoblang: .
A) B) C) 9 D) 3
13. Hisoblang:
A) b² B) a²b² C) a² D)
14. Ko`phadlarni ko`paytiring: (a –b)(a + b)(a² + b²).
A) a³ – b³ B) a⁴ – b⁴ C) a³ – b⁴ D) a⁴ + b³
15. Ifodani soddalashtiring: (18a⁴ + 21a²) : 3a² – 5a(2a + ).
A) 4a² + 2 B) 16a² + 12 C) - 4a² + 2 D) - 4a² +12
16. Bo`lishni bajaring: ( 16a³b² - 4a²b³ +a²b² ) : (4a²b²).
A) 4a + b + B) 4a + b +4 C) 4ab – 4 D) 4a - b +
17. Hisoblang: .
A) 1681 B) 41 C) D)
18. To`g`ri chiziqning ixtiyoriy nuqtasidan unga nechta perpendikulyar 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 120⁰. Bu burchaklarni toping.
A) 15⁰ , 105⁰ B) 30⁰ , 90⁰ C) 60⁰ , 60⁰ D) 45⁰, 75⁰
20. Teng yonli uchburchakning asosi yon tomonidan 3 birlikka kam, perimetri 36 ga teng bo`lsa uchburchakning yon tomonini toping.
A) 8 B) 10 C) 12 D) 13
21. Teng yonli uchburchakning perimetri 48, yon tomoni 18 ga teng. Uning asosini toping.
A) 12 B) 18 C) 16 D) 14
22. Uchburchakning bir uchi va shu uchining qarshisidagi tomon o`rtasini tutashtiruvchi kesma nima deb ataladi ?
A) balandlik B) mediana C) bissektrisa D) to`g`ri javob yo`q
23. Uchburchakning bir uchidan shu uchining qarshisidagi tomonga tushirilgan perpendikulyar nima deb ataladi ?
A) bissektrisa B) mediana C) balandlik D) to`g`ri javob yo`q
24. Teng yonli uchburchakning perimetri 48 ga teng. Uning tomonlaridan biri 12 ga teng bo`lsa, qolgan tomonlarini toping.
A) 12; 12 B) 16; 16 C) 18; 24 D) 18; 18
25. Teng yonli uchburchakning perimetri 36 ga, tomonlaridan biri esa 16 ga teng. Uchburchakning qolgan ikki tomonining uzunliklarini toping.
A) 10 va 10 yoki 16 va 4 B) 10 va 10 C) 16 va 4 D) bunday uchburchak mavjud emas