Uy » Online olimpiada » Matematika olimpiada » 11-sinf Matematika olimpiada №4 Matematika olimpiadaTuman 2022-2023 o'quv yili 11-sinf Matematika olimpiada №4 InfoMaster Avgust 19, 2024 75 Ko'rishlar 2 izohlar SaqlashSaqlanganOlib tashlandi 0 4 123456789101112131415161718192021222324252627282930 Vaqtingiz tugadi! 11-sinf Matematika olimpiada №4 2022-yil 12-oktyabr: 2022-2023 o'quv yilida tuman bosqichida tushgan savollar! 1 / 30 1. Beshyulduzning uchidagi burchaklarining yig‘indisini toping. A) 180° B) 240° C) 90° D) 270° 2 / 30 2. f(x)=x³/3-x²-35x+2 funksiya uchun f `(x)=0 bo`lsa x ni toping. A) −5 va 7 B) −7 va −5 C) 5 va 7 D) −7 va 5 3 / 30 3. funksiyaning boshlang`ich funksiyasini toping. A) I B) II C) III D) IV 4 / 30 4. Agar a = √5 + 1 va b = √5 − 1 bo‘lsa, 2a² − ab − a² ifodaning qiymatini toping. A) 6√5 + 2 B) 3√5 + 6 C) √5 + 6 D) 6√5 + 1 5 / 30 5. Soddalashtiring: A) I B) III C) IV D) II 6 / 30 6. BC = BE = CD ,∠DAE = 20°, ∠BCD = 60° ,∠ADE = ? (chizmaga qarang) A) 30° B) 50° C) 20° D) 40° 7 / 30 7. ? soniga teskari bo‘lgan son ? ning 9% ini tashkil qiladi. ? ni toping. (?u yerda, ? > 0) A) 13/3 B) 10/3 C) 8/3 D) 16/3 8 / 30 8. Soddalashtiring: A) −сtg13° B) −сtg²1° C) -1 D) −сtg1° 9 / 30 9. formula bilan berilgan sonli ketma-ketlikning dastlabki 20 ta hadining o‘rta arifmetigini toping. A) 23/6 B) 20/3 C) 25/6 D) 22/3 10 / 30 10. Doskaga ?1, ?2, ?3, . . . , ?200 sonlari yozilgan. Ma’lumki, ?1 = 3, ?2 = 9. Agar ixtiyoriy n natural son uchun ?n+2 = ?n+1 − ?n tenglik o‘rinli bo‘lsa, ?200 ni toping. A) 8 B) 9 C) 6 D) 3 11 / 30 11. un ketma-ketlik quyidagicha berilgan: u1 = 1, un+1 = un + 8n. U holda, u50 −u30 ni toping. A) 6230 B) 6320 C) 6320 D) 5320 12 / 30 12. Uchlari A(2; −3), B(6; −1), C(6; 4) va D(2; 2) nuqtalarda bo‘lgan ABCD to‘rtburchak yuzini toping. A) 20 B) 15 C) 18 D) 16 13 / 30 13. (3 − cos²x− 2sinx)(lg²y+ 2lgy+ 4) ≤ 3 bo‘lsa, sin²x+ 20y+ 1 ni toping. A) 5 B) 3 C) 4 D) 2 14 / 30 14. Soddalashtiring: A) B B) D C) C D) A 15 / 30 15. Agar bo‘lsa sin²α ni toping. A) B B) C C) D D) A 16 / 30 16. Tengsizliklar sistemasinining butun yechimlari sonini toping. A) 5 B) 7 C) 6 D) 4 17 / 30 17. Agar ifodaning qiymatini toping. A) 0.05 B) 20 C) 0.8 D) 4 18 / 30 18. Tenglamani yeching: A) 0 B) 10/21 C) ∅ D) 29/462 19 / 30 19. Raqamlari yig‘indisi 10 dan kam bo‘lmagan, raqamlari ko‘paytmasi esa 10 dan katta bo‘lmagan uch xonali sonlar nechta? A) 106 B) 89 C) 96 D) 100 20 / 30 20. Hisoblang: A) A B) D C) C D) B 21 / 30 21. To‘g‘ri burchakli uchburchakning bir burchagi 60° ga teng. Bu burchakdan chiqarilgan bissektrisaning uzunligi 2 m. Uchburchakning gipotenuzasi uzunligini toping. A) 2√3 B) √3 C) √5 D) √5 +1 22 / 30 22. Muntazam uchburchak 36 ta yuzi 1 ga teng bo‘lgan kichkina muntazam uchburchaklardan iborat (chizmaga qarang!). ABC uchburchak yuzini toping. A) 13 B) 12 C) 10 D) 11 23 / 30 23. ABCD - kvadrat, AC-diagonal. Agar AE=BE+CE ( a + b = c ) bo‘lsa, ∠AEB burchakni toping(chizmaga qarang!). A) 45 B) 50 C) 60 D) 55 24 / 30 24. ABC uchburchakda ctgA+ctgB= 3 va AB= 12 bo‘lsa, ABC uchburchak yuzini toping. A) 216 B) 521 C) 123 D) 265 25 / 30 25. Nargizada 2 ta olma va 3 ta nok bor. U 5 kun ketma-ket har kuni singliga bittadan meva beradi. Bu ishni necha usul bilan amalga oshirish mumkin? A) 10 B) 12 C) 6 D) 8 26 / 30 26. Natural son roppa-rosa 2 ta tub bo‘luvchiga, bu sonning kvadrati esa 45 ta turli natural bo‘luvchiga ega. Berilgan sonning kubi eng ko‘pi bilan nechta natural bo‘luvchiga ega bo‘lishi mumkin? A) 81 B) 40 C) 41 D) 91 27 / 30 27. ∠CAD = 2∠ACD, AC =13a, BD = 5a va AB = CD bo’lsa, 20⋅cos ∠ACD ni toping.(chizmaga qarang!) A) 16 B) 17 C) 15 D) 19 28 / 30 28. Arifmetik progressiyada ?2 = 12, ?7 − ?4 = 9 bo‘lsa, ?19 ni toping. A) 54 B) 56 C) 61 D) 63 29 / 30 29. O‘tkir burchakli uchburchakning ikki tomon uzunliklari ayirmasi 8, bu tomonlarning uchinchi tomondagi proyeksiyalari mos ravishda 8 va 20 ga teng. Berilgan uchburchakka tashqi chizilgan aylana radiusini toping. A) 35/3 B) 85/6 C) 37/3 D) 83/6 30 / 30 30. a2b5 = 620 tenglikni qanoatlantiruvchi nechta (?; ?) butun sonlar juftligi mavjud? A) 10 B) 14 C) 8 D) 12 0% Tomonidan Wordpress Quiz plugin Author: InfoMaster Foydali bo'lsa mamnunmiz