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 42 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. Hisoblang: A) 5 B) 0,5 C) 1 D) 1,5 2 / 30 2. ax²+bc+c=0 kvadrat tenglama bitta manfiy, bitta musbat ildizga ega bo`lsa, quyidagilardan qaysibiri to`g`ri?(D=b2−4ac) A) 1 B) 4 C) 2 D) 3 3 / 30 3. n ∈ ? va bo’lsa, ? ning eng katta qiymatini toping. A) 890 B) 980 C) 680 D) 790 4 / 30 4. Agar ABC uchburchakning AB va AC tomonlarida M va N nuqtalar olinib, ular tomonlarni mos ravishda AM:BM=3:5 va AN:CN=4:5 kabi nisbatda bo’lsa, CM to’g’ri chiziq BN kesmani qanday nisbatda bo’ladi? A) 3:2 B) 5:3 C) 3:1 D) 4:3 5 / 30 5. Tenglamani yeching: (71² + 81²)(7² + 8²) = 1135² + ?² A) 159 B) 161 C) 169 D) 151 6 / 30 6. 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) 2200 D) 2198 7 / 30 7. 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) 9 C) 12 D) 7 8 / 30 8. Soddalashtiring: A) B B) C C) A D) D 9 / 30 9. Uchlari A(2; −3), B(6; 0), C(6; 2) va D(2; 2) nuqtalarda bo‘lgan ABCD to‘rtburchak yuzini toping. A) 18 B) 16 C) 12 D) 14 10 / 30 10. Ikkinchi raqami uchinchi raqamidan 4 marta katta, birinchi raqami esa ikkinchi raqamidan 3 ta kam bo‘lgan uch xonali sonlar nechta? A) 4 B) 3 C) 1 D) 2 11 / 30 11. Agar bo'lsa, ning qiymatini toping. A) 5 B) 0 C) -4 D) 6 12 / 30 12. Tenglamani yeching: A) 10/11 B) 0 C) Ø D) 29/220 13 / 30 13. Hisoblang: A) -22/12 B) -11/6 C) -5/4 D) -4/3 14 / 30 14. Chizmada ∠AOD = 120∘, ∠BOD = 3∠AOB ?a ∠AOC = 2∠COD bo‘lsa, ∠BOC burchak nimaga teng? A) 30° B) 45° C) 50° D) 60° 15 / 30 15. a parametrning qanday qiymatlarida 9 + 3a, 5 − 2a va 15 − 5a uzunlikdagi kesmalardan uchburchak yashash mumkin? A) (0; 2,5) B) (1/6 ; 1,1) C) (1/3 ; 1,2) D) (1/6 ; 1,5) 16 / 30 16. 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) 5 B) 9 C) 6 D) 2 17 / 30 17. Agar 3x − y = 7 va 5x + 4y = 21 bo‘lsa, 24x + 9y ni hisoblang. A) 69 B) 84 C) 78 D) 90 18 / 30 18. Soddalashtiring: A) C B) B C) D D) A 19 / 30 19. Agar ac < 0 bo‘lsa, y=ax-bx²-c funksiya grafigi koordinatalar tekisligining qaysi choraklaridan o‘tadi? A) I,II,III B) II, III, IV C) Barcha chorakdan o'tadi? D) I, III, IV 20 / 30 20. x0 haqiqiy son x³ +1 = (x² − x −1)² − 4 tenglama ildizi bo‘lsa, (x0 − 1)² ni toping. A) 3 B) 2 C) 5 D) 7 21 / 30 21. Soddalashtiring A) 9 B) 6 C) 5 D) 0 22 / 30 22. ABCD to‘rtburchakda: AB=CD, BC= AD. Agar A burchak B burchakdan 4 marta katta bo‘lsa, to‘rtburchakning A burchagini toping. A) 124° B) 148° C) 144° D) 132° 23 / 30 23. Raqamlari yig‘indisi 2 ga teng bo‘lgan o‘n xonali natural sonlar nechta? A) 9 B) 15 C) 25 D) 10 24 / 30 24. Hisoblang: A) 5 B) 8 C) 0 D) -6 25 / 30 25. tengsizlikning (−5; 5) oraliqda nechta butun yechimi mavjud? A) 8 B) 9 C) 10 D) 7 26 / 30 26. Ikki son o’rtasidagi ∆ operatsiyasiga ko‘ra quyidagi natijalar olindi: 12 ∆ 1 operatsiya natijasini toping. A) 136 B) 132 C) 121 D) 125 27 / 30 27. Soat strelkasi 5 soat vaqt o‘tgandan keyin qanday burchakka buriladi? A) 100° B) 120° C) 160° D) 150° 28 / 30 28. a parametrning qanday qiymatlarida 9 + 3a, 5 − 2a va 15 − 5a uzunlikdagi kesmalardan uchburchak yashash mumkin? A) (1/3 ; 1,2) B) (1/6 ; 1,5) C) (1/6 ; 1,1) D) (0; 2,5) 29 / 30 29. Agar a + b − 2c = 0 bo’lsa, ni hisoblang. A) 3 B) 0 C) 2 D) 1 30 / 30 30. Soddalashtiring: A) A B) D C) C D) B 0% Tomonidan Wordpress Quiz plugin Author: InfoMaster Foydali bo'lsa mamnunmiz