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 55 Ko'rishlar 2 izohlar SaqlashSaqlanganOlib tashlandi 0 0 123456789101112131415161718192021222324252627282930 Vaqtingiz tugadi! 11-sinf Matematika olimpiada №4 2022-yil 12-oktyabr: 2022-2023 o'quv yilida tuman bosqichida tushgan savollar! 1 / 30 1. To‘g‘ri burchakli uchburchakda AC=3, BC=4, CD-balandlik va CE-bissektrisa. DE ni toping. A) 12/35 B) 15/31 C) 21 D) 23/35 2 / 30 2. Agar f(g(x))= − x+13 bo`lsa, f(x) va g(x) to`g`ri chiziqlar orasidagi burchakni toping . A) π/3 B) π/2 C) π/4 D) 0 3 / 30 3. |x²+2x-8|=3a tenglama a ning qanday qiymatlarida 3 ta haqiqiy yechimga ega bo`ladi. A) 1 B) (0;3) C) a=3 D) a>3, a=0 4 / 30 4. АВCDE beshburchak berilgan, М, N, Р va Q nuqtalar —АВ, ВС, CD va DE tomonlarning o‘rtalari. Agar U va V — МP? va NQ ning o‘rtasi bo‘lsa, АЕ: UV nisbatni toping. A) 3 B) 5 C) 4 D) 6 5 / 30 5. Berilgan natural son 400 dan katta va 500 dan kichik. Uning raqamlari yig‘indisi 9 va u berilgan sonning raqamlari teskari tartibda yozilgan sonning 47/36 qismiga teng. Berilgan sonni toping. A) 444 B) 433 C) 443 D) 423 6 / 30 6. Hisoblang: A) B B) A C) D D) C 7 / 30 7. ∠CAD = 2∠ACD, AC =13a, BD = 5a va AB = CD bo’lsa, 20⋅cos ∠ACD ni toping.(chizmaga qarang!) A) 17 B) 19 C) 15 D) 16 8 / 30 8. Tenglamani yeching: A) 29/462 B) ∅ C) 10/21 D) 0 9 / 30 9. ABCD - kvadrat, AC-diagonal. Agar AE=BE+CE ( a + b = c ) bo‘lsa, ∠AEB burchakni toping(chizmaga qarang!). A) 45 B) 60 C) 55 D) 50 10 / 30 10. Soddalashtiring: A) C B) A C) B D) D 11 / 30 11. 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 12 / 30 12. Soddalashtiring: bunda, |?| < 1. A) 2-2a B) -2 C) 2a+4 D) 4-2a 13 / 30 13. Raqamlari yig‘indisi 10 dan kam bo‘lmagan, raqamlari ko‘paytmasi esa 10 dan katta bo‘lmagan uch xonali sonlar nechta? A) 106 B) 96 C) 89 D) 100 14 / 30 14. Soatning minut mili 144° ga burilganda, soatning soat mili qanday burchakka burilada? A) 18° B) 9° C) 12° D) 6° 15 / 30 15. ? soniga teskari bo‘lgan son ? ning 9% ini tashkil qiladi. ? ni toping. (?u yerda, ? > 0) A) 8/3 B) 16/3 C) 10/3 D) 13/3 16 / 30 16. Tengsizliklar sistemasinining butun yechimlari sonini toping. A) 7 B) 4 C) 5 D) 6 17 / 30 17. Uchlari A(2; −3), B(6; −1), C(6; 4) va D(2; 2) nuqtalarda bo‘lgan ABCD to‘rtburchak yuzini toping. A) 15 B) 18 C) 16 D) 20 18 / 30 18. Agar bo‘lsa sin²α ni toping. A) C B) A C) D D) B 19 / 30 19. 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) 3 C) 6 D) 9 20 / 30 20. Soddalashtiring: A) −сtg1° B) −сtg²1° C) −сtg13° D) -1 21 / 30 21. (3 − cos²x− 2sinx)(lg²y+ 2lgy+ 4) ≤ 3 bo‘lsa, sin²x+ 20y+ 1 ni toping. A) 2 B) 3 C) 5 D) 4 22 / 30 22. BC = BE = CD ,∠DAE = 20°, ∠BCD = 60° ,∠ADE = ? (chizmaga qarang) A) 30° B) 20° C) 50° D) 40° 23 / 30 23. 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) 40 B) 91 C) 81 D) 41 24 / 30 24. bo’lsa, P(−1) ni toping. A) 115 B) 120 C) 100 D) 105 25 / 30 25. Arifmetik progressiyada ?2 = 12, ?7 − ?4 = 9 bo‘lsa, ?19 ni toping. A) 54 B) 63 C) 56 D) 61 26 / 30 26. ABC uchburchakda ctgA+ctgB= 3 va AB= 12 bo‘lsa, ABC uchburchak yuzini toping. A) 265 B) 123 C) 216 D) 521 27 / 30 27. a2b5 = 620 tenglikni qanoatlantiruvchi nechta (?; ?) butun sonlar juftligi mavjud? A) 8 B) 14 C) 10 D) 12 28 / 30 28. Muntazam uchburchak 36 ta yuzi 1 ga teng bo‘lgan kichkina muntazam uchburchaklardan iborat (chizmaga qarang!). ABC uchburchak yuzini toping. A) 11 B) 10 C) 12 D) 13 29 / 30 29. y = x² − 2x + 3 parabolaga y = 3 to‘g‘ri chiziqqa nisbatan simmetrik bo‘lgan parabola tenglamasini tuzing. A) y = x² − 2x - 3 B) y =-x² + 2x + 3 C) y = -x² − 2x + 3 D) y =-x² + 2x - 3 30 / 30 30. 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 0% Tomonidan Wordpress Quiz plugin Author: InfoMaster Foydali bo'lsa mamnunmiz