Uy » Online olimpiada » Matematika olimpiada » 9-sinf Matematika olimpiada №2 Matematika olimpiadaTuman 2019-2020 o'quv yili 9-sinf Matematika olimpiada №2 InfoMaster Avgust 19, 2024 347 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 0 0 12345678910111213141516171819202122232425 Vaqtingiz tugadi! 9-sinf Matematika olimpiada №2 2019-yil tuman bosqichida tushgan savollar 1 / 25 1. stemadan ni toping. A) 7/11 B) 7/3 C) 3/7 D) 11/7 2 / 25 2. Rombning diagonallari 6 va 8 ga teng bo‘lsa, uning tomonini toping. A) 5 B) 6 C) 8 D) 3 3 / 25 3. Agar bo‘lsa, ko‘paytmani hisoblang. A) 31/35 B) 1/35 C) -1 D) 1/33 4 / 25 4. Sonlarni o`sish tartibida yozing. A) a B) c C) c D) b 5 / 25 5. (a2- 9)x = a2+ 2a - 3 tenglama a ningqandayqiymatidacheksizko’pyechimgaega? A) a=2 ; a = -3 B) a = 1 C) a ≠1 D) a=−3 6 / 25 6. Funksiya berilgan. f(f(−1)) ni toping. A) 5 B) 29 C) 15 D) 18 7 / 25 7. x0 soni tenglamani ildizi bo`lsa, x²0 -64 ni toping. A) -48 B) 20/69 C) 0 D) 8 8 / 25 8. ax²+bc+c=0 kvadrat tenglama bitta manfiy, bitta musbat ildizga ega bo`lsa, quyidagilardan qaysibiri to`g`ri?(D=b2−4ac) A) 4 B) 1 C) 2 D) 3 9 / 25 9. Hisoblang: cos 10o − 2 cos 50o − cos 70o A) –cos40° B) –sin40° C) cos40° D) sin40° 10 / 25 10. ABC uchburchakning AB tomonidan M va N nuqtalar shunday tanlab olinganki, BN=NM=MA. AC tomonidan K va L nuqtalar shunday tanlab olindiki AK=3KL=1,5LC bo'ldi. SMNLK: SMNLK=? A) 0,5 B) 3 C) 2 D) 1 11 / 25 11. 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) 5 B) 3 C) 4 D) 2 12 / 25 12. tengsizlikni yeching. A) (-∞;-1/2)∪(-1/2;3)∪(3;∞) B) xℇR C) (-∞;3)∪(3;∞) D) (-∞;-1/2)∪(-1/2;∞) 13 / 25 13. Birinchi quvurdan ikkinchi quvurga qaraganda ikki barobar ko’p suv oqadi.Ikkalasi birgalikda bo’sh hovuzni 12 soatda to’ldiradi.Birinchi quvur hovuzning uchdan bir qismini necha soatda to’ldiradi? A) 12 B) 9 C) 4 D) 6 14 / 25 14. Agar a-b =|x| + 3 bo’lsa a va b lar uchun to’g’ri munosabatni aniqlang. A) a>b B) a ≤ b C) a D) a=b+1 15 / 25 15. Bahodir o`zidagi 411 dona yong`oqni 4 ta bolaga bo`lib berdi. Agar Sanjar va O`ktamning olgan yong`oqlari soni 2 va 3 sonlariga to`g`ri proporsional ,O`ktam va Sohibning yong`oqlari 7 va 5 sonlariga teskari proporsional , Sanjar va G`anisherning yong`oqlari esa 9 va 4 sonlariga teskari proporsional ekanligi ma`lum bo`lsa, G`anisher nechta yong`oq olgan? A) 145 B) 126 C) 135 D) 180 16 / 25 16. Agar sin x + cos x = 1,04 tenglik o’rinli bo’lsa, x qaysi chorakda joylashgan? A) IV B) III C) I D) II 17 / 25 17. ABCD trapetsiyaning yuzi 36 gateng, asoslari DC=6, AB=2. BC tomonidan E nuqta olingan bo’lib, BE=2EC bo’lsa, ADE uchbutchakning yuzini toping. A) 12 B) 14 C) 16 D) 21 18 / 25 18. ABCD parallelogramda AB=10, AD=16. BC tomonga AE va DF bissektrisalar o`tkazilganbo`lib, ular G nuqtada kesishadi. E va F nuqtalar BC tomonda bo`lsa, AGD va FGE uchgburchaklar yuzalari nisbatini toping. A) 16 B) 36 C) 4 D) 64 19 / 25 19. Agar bo’lsa , x va y sonlarning ko’paytmasini toping. A) 8 B) -4 C) 6 D) -2 20 / 25 20. f(x) funksiyani toping. A) (1-x)/(1+x) B) 1/x C) 1/(1-x) D) (1+x)/(1-x) 21 / 25 21. Muntazam uchburchakning ichidagi nuqtadan tomonlarigacha bo`lgan masofalar yig`indisi 6 ga teng bo`lsa, uchburchak yuzini toping. A) 55 B) 84 C) 99 D) 12√3 22 / 25 22. Tenglamalar sistemasi nechta yechimga ega? A) 1 B) 4 C) 2 D) 6 23 / 25 23. 20 dan 250 gacha sonlarichida 4 ga bo`linadigan, lekin 6 ga bo`linmaydigan nechta natural son bor? A) 48 B) 39 C) 33 D) 30 24 / 25 24. Baliq og‘irliklari 14:12:11:8:15 kabi nisbatda bo‘lgan besh bo‘lakka bo‘lindi. Ikkinchi bo‘lakning og‘irligi 1,12 kg bo‘lsa, butun baliqning og‘irligini qancha? A) 6,4 kg B) 4,48 kg C) 6,72 kg D) 5,6 kg 25 / 25 25. ?, ? natural sonlari uchun 3? + 2? soni 11 ga qoldiqsiz bo‘linadi. u holda quyidagi sonlardan qaysi biri 11 ga qoldiqsiz bo’linmasligi mumkin? A) 14? + 13b B) 8(10? + 3?) C) 47? + 34? D) 58? + 90? 0% Testni qayta ishga tushiring Author: InfoMaster Foydali bo'lsa mamnunmiz
