Uy » Online olimpiada » Matematika olimpiada » 9-sinf Matematika olimpiada №4 Matematika olimpiadaTuman 2022-2023 o'quv yili 9-sinf Matematika olimpiada №4 InfoMaster Avgust 19, 2024 23 Ko'rishlar 2 izohlar SaqlashSaqlanganOlib tashlandi 0 0 123456789101112131415161718192021222324252627282930 Vaqtingiz tugadi! 9-sinf Matematika olimpiada №4 2022-yil 12-oktabr: 2022-2023 o'quv yili tuman bosqichida tushgan savollar! 1 / 30 1. Agar (3-a)(3-b)(3-c)=(3+a)(3+b)(3+c) bo‘lsa, ni hisoblang. (Bunda ). A) -1/9 B) 1/27 C) 1/9 D) -1/3 2 / 30 2. ABC uchburchakda O nuqta AD medianava BE bissektrisalar kesishishnuqtasi. AOEva BOD uchburchaklar yuzlari mos ravishda 1 va 3 ga teng bo`lsa, EOC uchburchakning yuzini toping. A) 4 B) 3 C) 5 D) 2 3 / 30 3. Teng yonli ABC (AC=BC) uchburchakning AC tomonida D nuqta olingan. K - BD kesma va AH balandlik kesishgan nuqta. Agar AD=AK bo‘lsa, u holda DBA burchakni toping. A) 75° B) 30° C) 45° D) 60° 4 / 30 4. Doiraga tomoni 3 sm ga teng kvadrat ichki chizilgan. Shu doira yuzini toping. A) 18π B) 5,5π C) 2,25π D) 4,5π 5 / 30 5. to‘g‘ri chiziqlar orasidagi burchakni toping. A) 5° B) 45° C) 15° D) 30° 6 / 30 6. f(x)=ax+b funksiya grafigi A(-1;3) va B(1;7) nuqtalar orqali o‘tadi. f(4- f( -1)) ni toping A) 10 B) 7 C) 12 D) 9 7 / 30 7. a parametrning qanday qiymatlarida 9 + 3a, 5 − 2a va 15 − 5a uzunlikdagi kesmalardan uchburchak yashash mumkin? A) (1/6 ; 1,1) B) (0; 2,5) C) (1/6 ; 1,5) D) (1/3 ; 1,2) 8 / 30 8. tengsizlikning (−5; 5) oraliqda nechta butun yechimi mavjud? A) 7 B) 10 C) 8 D) 9 9 / 30 9. a = 0,12(12), ? = 0,1(21), c = 0,12(11). Agar a+ b+ c= 0, x1x2x3x4... x2021x2022x2023... bo‘lsa, x2022 ni toping (bunda, x1, x2... raqamlar). A) 2 B) 5 C) 6 D) 9 10 / 30 10. Agar AB =12, BC =14, CD = 2 bo’lsa, aylana radiusini aniqlang. A) 9 B) 8 C) 10 D) 11 11 / 30 11. Agar ac < 0 bo‘lsa, y=ax-bx²-c funksiya grafigi koordinatalar tekisligining qaysi choraklaridan o‘tadi? A) II, III, IV B) I,II,III C) Barcha chorakdan o'tadi? D) I, III, IV 12 / 30 12. Soddalashtiring: A) A B) B C) C D) D 13 / 30 13. a parametrning qanday qiymatlarida 9 + 3a, 5 − 2a va 15 − 5a uzunlikdagi kesmalardan uchburchak yashash mumkin? A) (1/6 ; 1,1) B) (1/3 ; 1,2) C) (0; 2,5) D) (1/6 ; 1,5) 14 / 30 14. Hisoblang: A) 5 B) 0 C) 8 D) -6 15 / 30 15. Soddalashtiring A) 6 B) 9 C) 5 D) 0 16 / 30 16. Soat strelkasi 5 soat vaqt o‘tgandan keyin qanday burchakka buriladi? A) 120° B) 100° C) 150° D) 160° 17 / 30 17. Anvar 2 dan boshlab barcha natural sonlarni doskaga yozdi. U yozayotganda to‘la kub bo‘lgan sonlarni qoldirib ketdi (8, 125 kabi). Doskaga 2186-o‘rinda yozilgan sonni toping. A) 2197 B) 2199 C) 2198 D) 2200 18 / 30 18. Chizmada ∠AOD = 120∘, ∠BOD = 3∠AOB ?a ∠AOC = 2∠COD bo‘lsa, ∠BOC burchak nimaga teng? A) 45° B) 50° C) 30° D) 60° 19 / 30 19. Ikkinchi raqami uchinchi raqamidan 4 marta katta, birinchi raqami esa ikkinchi raqamidan 3 ta kam bo‘lgan uch xonali sonlar nechta? A) 1 B) 2 C) 4 D) 3 20 / 30 20. Soddalashtiring: A) D B) C C) A D) B 21 / 30 21. Soddalashtiring: A) A B) C C) B D) D 22 / 30 22. Uchlari A(2; −3), B(6; 0), C(6; 2) va D(2; 2) nuqtalarda bo‘lgan ABCD to‘rtburchak yuzini toping. A) 14 B) 18 C) 12 D) 16 23 / 30 23. x0 haqiqiy son x³ +1 = (x² − x −1)² − 4 tenglama ildizi bo‘lsa, (x0 − 1)² ni toping. A) 7 B) 5 C) 2 D) 3 24 / 30 24. Ikkinchi raqami uchinchi raqamidan 1 ta kam bo‘lgan uch xonali sonlar sonini toping. A) 63 B) 55 C) 95 D) 81 25 / 30 25. Ikki son o’rtasidagi ∆ operatsiyasiga ko‘ra quyidagi natijalar olindi: 12 ∆ 1 operatsiya natijasini toping. A) 132 B) 121 C) 136 D) 125 26 / 30 26. Agar bo'lsa, ning qiymatini toping. A) -4 B) 5 C) 6 D) 0 27 / 30 27. −16 ≤ 2(y − 7) ≤ 0 va −7 ≤ x ≤ 8 bo‘lsa, x² − y² ifodaning eng kichik qiymatini toping. A) 3 B) 0 C) 2 D) 1 28 / 30 28. Chizmadagi uchburchaklar sonini toping. A) 30 B) 26 C) 28 D) 24 29 / 30 29. Agar a + b − 2c = 0 bo’lsa, ni hisoblang. A) 3 B) 0 C) 1 D) 2 30 / 30 30. Raqamlari yig‘indisi 2 ga teng bo‘lgan o‘n xonali natural sonlar nechta? A) 10 B) 15 C) 25 D) 9 0% Tomonidan Wordpress Quiz plugin Author: InfoMaster Foydali bo'lsa mamnunmiz