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 257 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. Rombning diagonallari 6 va 8 ga teng bo‘lsa, uning tomonini toping. A) 6 B) 5 C) 8 D) 3 2 / 25 2. ni hisoblang. A) -2 B) 4 C) 3 D) 2 3 / 25 3. P(x) ko‘phadni x-a ga bo‘lgandagi qoldiqni toping. A) 0 B) P(x) C) P(a) D) P(x-a) 4 / 25 4. tengsizlikni yeching. A) (-∞;3)∪(3;∞) B) (-∞;-1/2)∪(-1/2;3)∪(3;∞) C) xℇR D) (-∞;-1/2)∪(-1/2;∞) 5 / 25 5. (a2- 9)x = a2+ 2a - 3 tenglama a ningqandayqiymatidacheksizko’pyechimgaega? A) a=−3 B) a=2 ; a = -3 C) a ≠1 D) a = 1 6 / 25 6. 20 dan 250 gacha sonlarichida 4 ga bo`linadigan, lekin 6 ga bo`linmaydigan nechta natural son bor? A) 30 B) 39 C) 48 D) 33 7 / 25 7. Agar f(x) = (a + b − 4)x3+ 2x2+ (b − 3)x +6 juftfunksiyaberilganbo’lsa, f(b) ningqiymatini toping. A) 27 B) 7 C) 24 D) 20 8 / 25 8. Sonlarni o`sish tartibida yozing. A) a B) b C) c D) c 9 / 25 9. Agar bo’lsa , x va y sonlarning ko’paytmasini toping. A) -2 B) 8 C) -4 D) 6 10 / 25 10. Muntazam uchburchakning ichidagi nuqtadan tomonlarigacha bo`lgan masofalar yig`indisi 6 ga teng bo`lsa, uchburchak yuzini toping. A) 55 B) 99 C) 12√3 D) 84 11 / 25 11. ax²+bc+c=0 kvadrat tenglama bitta manfiy, bitta musbat ildizga ega bo`lsa, quyidagilardan qaysibiri to`g`ri?(D=b2−4ac) A) 3 B) 2 C) 4 D) 1 12 / 25 12. Agar cheksiz kamayuvchi geometrik progressiyaning hadlari yig`indisi ga teng bo`lsa, uning hadlari kublari yig`indisining hadlari kvadratlari yig`indisiga nisbatini toping. A) 1 B) 4 C) 2 D) 3 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) 6 B) 9 C) 12 D) 4 14 / 25 14. Agar x2−8x+20z+4z2+41=0 tenglik o`rinli bo`lsa, xz ni toping. A) -20 B) -10 C) -5 D) -40 15 / 25 15. Tenglamalar sistemasi nechta yechimga ega? A) 4 B) 6 C) 1 D) 2 16 / 25 16. Agar arifmetik progressiyada bo`lsa, ayirmani toping. A) 4 B) 3 C) 1 D) 2 17 / 25 17. 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) 2 B) 3 C) 4 D) 5 18 / 25 18. Agar sin x + cos x = 1,04 tenglik o’rinli bo’lsa, x qaysi chorakda joylashgan? A) II B) I C) III D) IV 19 / 25 19. x0 soni tenglamani ildizi bo`lsa, x²0 -64 ni toping. A) -48 B) 20/69 C) 0 D) 8 20 / 25 20. f(x) funksiyani toping. A) 1/x B) (1+x)/(1-x) C) (1-x)/(1+x) D) 1/(1-x) 21 / 25 21. 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) 180 B) 145 C) 126 D) 135 22 / 25 22. 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=b+1 D) a 23 / 25 23. 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) 21 B) 16 C) 12 D) 14 24 / 25 24. Massasi 228 g tuzli aralashma tarkibida 88,2% suv bor. Aralashma tarkibida 81% suv bo’lishi uchun qancha suvni bug’lantirish kerak? A) 72,4 B) 86,4 C) 76,4 D) 84,6 25 / 25 25. N+4 va N-85 sonlari natural son kvadrati bo‘ladigan N natural sonni toping. A) 2023 B) 2022 C) 2019 D) 2021 0% Testni qayta ishga tushiring Author: InfoMaster Foydali bo'lsa mamnunmiz
