2015-yilning variantlari Matematika (Informatika) javoblari bilan

VARIANT № 123
1. 3 soni bilan no’malum son orasiga shunday son qo’yiladiki, bu uchta son arifmetik progressiya tashkil etadi. Agar ikkinchi son 6 ga kamaytirilsa , musbat hadli geometrik progressiya hosil bo’ladi. Arifmetik progressiyaning ikkinchi hadini toping?
A) 12 B) 15 C) 27 P )1 4
2 tenglamaning haqiqiy ildizlari yig’indisini toping.
A) 3 B ) 1 C )2 D) 0
3. ni hisoblang.
A) 1 B) ½ C)1/4 D) 2
4. tenglamani yeching.
A) 3 B) 1 C ) D )
5. Agar bo’lsa, S qaysi oraliqqa tegishli?
A) B)(6;7) C) D)
6. A(4;6), B (2 ;1) va C(6;1) nuqtalarni tutashtirishdan hosil bo’ladigan uchburchak yuzini toping.
A) 15 B ) 8 C)10 D) 20
7. Rombning diognallari 6 va 4 ga teng bo'lsa, uning yuzini toping.
A) 24 B ) 12 C ) 16 D) 10
8. Agar xy+yz+zx=16 bo’lsa, x²+y²+z² ning eng kichik qiymatini toping.
A) 18 B ) 32 C) 24 D) 16
9. To’g’ri burchakli uchburchakning katetlari o’zaro 3:4 nisbatda, gipotenuzasi 15 sm ga teng. Shu uchburchakning kichik katetini toping.
A) 20 B ) 10 C )9 D) 15
10. hosilasini hisoblang.
A) 8x⁷ + 3sin3x B) C) 8x⁷ -3sin3x D)
11. tenglamaning ildizlari ko’paytmasini toping.
A) 6 B ) -2 C)-4 D) 4
12 funksiya hosilasining x=1 dagi qiymatini toping.
A) 4(e ln5)^-1 B) C) D)
13. A BC uchburchakda A) 10 B ) 12 C )8 D) 24
14. bo ‘lsa, f(f(3)) ni hisoblang
A) B) C) D)
15. Radiusi r =1 sm va R=3 sm bo’lgan aylanalar tashqi ravishda urinadi. Aylanalar urinish nuqtasidan ularning umumiy urinmalarigacha bo’lgan masofani toping.
A) 5/6 B ) 4/5 C) 2/3 D)3/2
16. Bir sonning 25% ortig’i shu sonning 20% kamidan necha foiz ko’p.
A) 56,25 B ) 60,5 C) 45 D) 66
17. y=sin2xcos4xcos2x funksiyaning eng kichik musbat davrini toping.
A) π/2 B) π/8 C) π/4 D) 2π
18. Ikkita shar berilgan bo'lib, ularning radiuslari 3 dm va 25 sm. Sharlar kesishish chizig'ining uzunligi 48 π sm bo'lsa, ularning markazlari orasidagi masofani (sm) toping.
A) 11 yoki 25 B ) 18 yoki 24 C) 11 yoki 24 D) 12 yoki 20
19. (24-(-3))+((+6)∙(-3)) ni hisoblang.
A) -36 B ) 1 C )0 D) 36
20. Tengsizliklar sistemasini yeching.

A) (2;4) B)(3;4) C)(3;6) D)(3;5)
21. tengsizlikni yeching
A) B) C ) ∅ D)
22. tenglamaning ildizlarini yig’indisini toping.
A) 2 B)3 C) 4,5 D) 4
23. ni hisoblang
A)9 B ) 18 C) 27 D) 9
24. Uchburchakning ikkita tomoni 24 va 11 ga ular orasidagi burchagi 120° ga teng. Shu uchburchakka tashqi chizilgan aylananing radiusini toping.
A) B) C) D)
25. ni hisoblang
A) B) C) D)
26. tenglamalar sistemasidan |x-y| ni toping.
A) 0 B) 1 C) 2 D) 3
27 . tengsizlikni yeching.
A)[0;∞) B){-3} va [0; 1] C) [ 1 ; ∞) D) [0; 1 ]
28. Radiusi R ga teng bo'lgan aylanaga tashqi chizilgan muntazam n burchakning tomoni b ga teng bo’lsa, shu aylanaga ichki chizilgan muntazam n- burchakning tomonini toping.
A) B) C) D)
29. ifodani soddalashtiring (a>0, b> 0).
A) a-b B) C)1 D )0
30. 2013²⁰¹⁵ ni 10 ga bo’lgandagi qoldiqni toping.
A) 7 B ) 9 C)1 D) 3
31.1 petabayt nechta gigabaytga teng?
A) 2²⁰ gigabayt B) 2¹⁰ gigabayt C) 2²⁵ gigabayt D) 2³⁰ gigabayt
32. Ikkilik sanoq sistcmasida amallarni bajaring. 101010+1∙2⁶+1∙2³+1∙2²+1∙2⁰-101
A ) 110010 B ) 1110110 C ) 1110010 D ) 111000
33. Windovs operatsiyon tizim (sistema) da papka va huijatlami vertical ustun shaklida tartiblash va ularni kichik ikonkalar tarzida kodlash usuli qaysi javobda to’g’ri ko'rsatilgan
A) Значок B ) Список C) Таблица D) Плитка
34. Amaliy dasturlar ta’minotiga kiruvchi dasturlar qaysijavobda to’g’ri ko'rsatilgan?
A) Paskal, Basic, Delphi,C++, MS DOS
B) grafik muharrirlari, ofis daturlari,global tarmoq, matn muharirlari
C) matn muharirlari nashriyot tizimlari, jadval protsessorlsri, ma’lumotlar omborini boshqarish tizimlari, grafik muxarrirlari
D) ma’lumotlar omborini boshqarish tizimlari, operatsion tizimlar, ma’lumotlar ombori, dasturiy ta'minot
35. Faqat brauzerlar berilgan qatorni ko’rsating.
A) AutoCAD, Internet Explorer
B) NetscapeNavigator, Internet Explorer C) MySQL, Internet Explorer D) Mozilla. MySQL
36. Qanday mantiq informatikaning asosida yotadi?
A) Fopmal. B) Extimollik . C) Matematik. D) Dialoktik.