Test. Shahzod ustoz

Test. Shahzod ustoz
1.f(-2) = 3 va f(2) = 5 shartni qanoatlantiruvchi chiziqli funksiyani aniqlang.
A) f(x) = 2x+1 B) f(x) = 3x+9 C) f(x) = 2x-1 D) f(x) = x+4
2.20 litr tuzli suvning tarkibida 12 % tuz bor.Bu eritmada tuz miqdori 15 % bo’lishi uchun necha litr suvni bug’lantirish kerak?
A) 4 B) 3 C) 5 D) 4,2
3.Hovuzdagi suv ikki quvur orqali chiqariladi.Birinchi quvur to’la hovuzni 30 minutda,ikkalasi quvur birgalikda uni 18 minutda bo’shatadi.Ikkinchi quvur to’la hovuzni necha minutda bo’shatadi?
A) 50 B) 45 C) 42 D) 48
4.Uzunligi 600 m bo’lgan poyezd uzunligi 1200 m bo’lgan tunneldan 1 minutda o’tib ketadi.Poyezd tezligini toping.
A) 35 m/s B) 40 m/s C) 25 m/s D) 30 m/s
5.Tengsizlikni yeching. ≥ 2
A) (-∞;-1] B) [-1;3] C) (-∞;-1]U[3;∞) D) [1;3]
6.Tenglamaning ildizlari yig’indisi toping. = 6
A) 5 B) 10 C) -6 D) -5
7.xy = va 36 < < 84 bo’lsa, x ning butun qiymatlari ko’paytmasini toping?
A) 120 B) 60 C) 90 D) 180
8. tengsizliklar sistemasi butun yechimlarining o’rta arifmetigini toping.
A) 3 B) 2,5 C) 2 D) 1,5
9.Ushbu tenglamalar sistemasining yechimini toping.
A) (-3;2) B) (-3;-2) C) (-3;-2) va (-3;2) D) Ø
10.Agar x² + y² = 281 va x – y = 11 bo’lsa, xy qanchaga teng bo’ladi?
A) 80 B) 160 C) -80 D) 40
11.a va b ning qanday qiymatida tenglik ayniyat bo’ladi? = +
A) a =1, b = 1 B) a = , b = C) a = 5, b = -5 D) a = , b =
12.a = 4b va c + 3b = 0 (b ≠ 0) bo’lsa, ni toping.
A) B) C) D)
13. y ni toping.
A) 0 B) 1 C) 2 D) -2
14.x² + x + a = 0 tenglamaning x₁ va x₂ ildizlari orasida + = munosabat o’rinli bo’lsa, a ning qiymatini toping.
A) -2,5 B) -2 C) -1 D) -1,5
15.p ning qanday qiymatida x² + px + 15 = 0 tenglamaning ildizlaridan biri 5 ga teng bo’ladi?
A) -4 B) -2 C) 2 D) -8
16.Kasrni qisqartiring :
A) B) C) D)
17.Tenglamani yeching : ⸱ (x+1) = 0,3(8)x
A) -2,(6) B) -3,(3) C) 2,(6) D) -3,(6)
18. Soddalashtiring :
A) 4 B) C) 10 D) 4
19.Agar a > 0, b > 0 va c < 0 bo’lsa to’g’ri tenglikni ko’rsating.
A) = a c B) = abc
C) = -abc D) = ab
20.Amallarni bajaring. + -
A) 1 B) 6 C) 5 D) -1
21.Agar x = 4,5 va y = 3,5 bo’lsa, x³ – x²y – xy² + y³ ni hisoblang.
A) 10 B) 9,5 C) 8 D) 7,2
22.Hisoblang : (1 - ) ⸱ (1 - ) ⸱…⸱ (1 - )
A) B) C) D)
23.Soddalashtiring : (2a + )( - a) :
A) B) C) D)
24.Ko’paytuvchilarga ajrating : a⁵ + a⁴ – 2a³ – 2a² + a + 1
A) (a + 1)² ⸱ (a - 1)³ B) (a + 1)³ ⸱ (a - 1)²
C) (a + 1)⁴ ⸱ (a - 1) D) (a + 1) ⸱ (a - 1)⁴
25. ko’paytma necha xonali son?
A) 54 B) 55 C) 56 D) 53
26.Tenglamani yeching:
A) B)
C) D)
27. Uchburchakning bir burchagi 89 ga teng ikkinchi nurchagi 31 ga teng. Uchinchi burchagini toping?
A) 90° B) 120° C) 60° D) 50°
28. Tengsizlikni yeching:
A) B) C) D)
29. y = -2x + b funksiya grafigi M(-1;7) nuqtada o’tadi. ni toping?
A) 9 B) 5 C) -2 D) -4
30.(+1 ball 20 tadan ortiq yechgan o’quvchiga)