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 296 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. Teng yonli trapetsiyaning diagonali uni ikkita teng yonli uchburchakka ajratadi. Trapetsiyaning burchaklarini toping. 1. 2. 3. 4. A) 1 B) 2 C) 4 D) 3 2 / 25 2. Agar bo‘lsa, ni hisoblang. A) 4 B) ±4 C) 3 D) -4 3 / 25 3. Ifodaning eng kichik qiymatini toping: A) -4 B) 4 C) 12 D) -12 4 / 25 4. Hisoblang: cos 10o − 2 cos 50o − cos 70o A) cos40° B) –cos40° C) sin40° D) –sin40° 5 / 25 5. f(x) funksiyani toping. A) (1+x)/(1-x) B) (1-x)/(1+x) C) 1/x D) 1/(1-x) 6 / 25 6. 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) 4 B) 6 C) 12 D) 9 7 / 25 7. 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) 16 B) 14 C) 21 D) 12 8 / 25 8. Agar sin x + cos x = 1,04 tenglik o’rinli bo’lsa, x qaysi chorakda joylashgan? A) II B) III C) IV D) I 9 / 25 9. (a2- 9)x = a2+ 2a - 3 tenglama a ningqandayqiymatidacheksizko’pyechimgaega? A) a=2 ; a = -3 B) a = 1 C) a ≠1 D) a=−3 10 / 25 10. Sonlarni o`sish tartibida yozing. A) a B) c C) b D) c 11 / 25 11. 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) 135 B) 180 C) 126 D) 145 12 / 25 12. x0 soni tenglamani ildizi bo`lsa, x²0 -64 ni toping. A) 20/69 B) 8 C) 0 D) -48 13 / 25 13. Agar arifmetik progressiyada bo`lsa, ayirmani toping. A) 3 B) 1 C) 4 D) 2 14 / 25 14. Agar bo’lsa , x va y sonlarning ko’paytmasini toping. A) 6 B) 8 C) -2 D) -4 15 / 25 15. 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) 4 C) 3 D) 5 16 / 25 16. Tenglamalar sistemasi nechta yechimga ega? A) 1 B) 2 C) 4 D) 6 17 / 25 17. Funksiya berilgan. f(f(−1)) ni toping. A) 15 B) 29 C) 18 D) 5 18 / 25 18. Agar cheksiz kamayuvchi geometrik progressiyaning hadlari yig`indisi ga teng bo`lsa, uning hadlari kublari yig`indisining hadlari kvadratlari yig`indisiga nisbatini toping. A) 4 B) 3 C) 2 D) 1 19 / 25 19. tengsizlikni yeching. A) xℇR B) (-∞;-1/2)∪(-1/2;∞) C) (-∞;-1/2)∪(-1/2;3)∪(3;∞) D) (-∞;3)∪(3;∞) 20 / 25 20. Agar x2−8x+20z+4z2+41=0 tenglik o`rinli bo`lsa, xz ni toping. A) -10 B) -40 C) -5 D) -20 21 / 25 21. 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 22 / 25 22. Agar f(x) = (a + b − 4)x3+ 2x2+ (b − 3)x +6 juftfunksiyaberilganbo’lsa, f(b) ningqiymatini toping. A) 7 B) 24 C) 27 D) 20 23 / 25 23. 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 24 / 25 24. bo‘lsa, 3? + ? ni toping. A) 5 B) 10 C) 2,5 D) 7,5 25 / 25 25. y = −3x − 10 va y = 0,5x −3 to‘g‘ri chiziqlar va absissa o‘qi bilan chegaralangan uchburchak yuzini toping. A) 28/3 B) 56/3 C) 9,6 D) 18,6 0% Testni qayta ishga tushiring Author: InfoMaster Foydali bo'lsa mamnunmiz
