9-sinf 1-variant

11-sinf

1-variant

⎧x + y + z = a

⎪ ^{2 2 2 2}

1. 
   Tenglamalar sistemasini yeching: ⎨x + y + z = a
   

⎪ 3 3 3 3

_⎩x + y + z = a

1. 
   (0; 0; a), (0; a; 0), (a; 0; 0) B) (a; 0; 0), (0; - a ; 0), (-a; a; a)
   

C) yechimi yo'q D) (0; 0; a), (0; a ; 0), (0; 0; 0)

E) cheksiz ko’p yechimi bor

2. 
   |x| + |y| < 100 tenglama nechta har xil butun yechimlarga ega? A) 19801 B) 10000 C) 16100 D) 200 E) 1980
   
3. 
   x² + y² +z² = 2xyz tenglama nechta butun yechimga ega?
   
   1. 
      1 B) yechimi yo'q C) 2 D)3 E) cheksiz ko’p
      
4. 
   Teng yonli trapetsiyaning diagonali uni ikkita teng yonli uchburchakka bo’ladi. Trapetsiyaning burchaklarini toping.
   

A) 72^o, 108^o B) 135^o, 45^o C) 100^o, 80^o D) 82^o, 98^o E) 102^o, 188^o

5. 
   Tenglamani yeching: x³ – [x] = 3 ( [а] – а sonining butun qismi) .
   

A) x = ³ 4 B) x = ³ 2 C) x = ³ 3 D) yechimi yo'q

E) x = ³ 4 , x = ³ 2 , x = ³ 3

5. 
   n ning qanday butun qiymatlarida 20ⁿ + 16ⁿ – 3ⁿ – 1 ifoda 323 ga bo'linadi?
   

A) n =2k B) n =2, 4, 8, 10 C) n =3, 4, 5, 6

D) n =2, 4, 6, 8, 10, 12 E) n ∈ ∅

5. 
   ABC uchburchakning AB va BC tomonlariga tushirilgan balandlik bu tomonlardan kichik emas. Uchburchakning burchaklarini toping.
   

A) 60^o, 60^o, 60^o B) 30^o, 30^o, 120^o C) 30^o, 60^o, 90^o D) 90^o, 45^o, 45^o E) 45^o, 60^o, 75^o

5. 
   Muntazam ABC ucburchakning ichidan shunday O nuqta olinganki, ∠AOB = 113^o, ∠BOC = 123^o. Tomonlari OA, OB, OC kesmalarga teng bo’lgan uchburchakning burchaklarini toping.
   

A) 53^o, 63^o, 64^o B) 30^o, 60^o, 90^o C) 45^o, 45^o, 90^o D) 10^o, 40^o, 120^o E) 43^o, 57^o, 80^o

5. 
   3⋅2^x+1=y² tenglamani qanoatlantiruvchi (x; y) butun sonlar juftligini toping.
   

1. 
   (0; 2), (0; -2), (3; 5), (3, -5), (4; 7), (4, -7)
   
2. 
   (0; 2), (0; -2) C) (3; 5) D) (4; 7), (-4; 7) E) ∅
   

2

5. 
   Hisoblang:
   

4 −3⁴ 5 + 2 5 − ⁴ 125

A) 1 + ⁴ 5 B) 1 C) 2 D) 5 E) 5

5. 
   x² = y² + 2y + 13 tenglamani qanoatlantiruvchi (x; y) butun sonlar juftligini toping.
   

A) (4; 1), (-4; 1) B) (4; 1), (4;- 1), (-4; 1), (-4; -3) C) (4; -3), (-4; -3) D) (4; 1) E) cheksiz ko'p

x3 ₂

5. 
   Tenglamani yeching: + x −4 = 0
   

4− x²

A) ± 2 B)2 C) ± 2 D) 2 E) yechimi yo'q

5. 
   Sonlarni taqqoslang: a = sin1 , b = log₃ 7 .
   

A) a = b B) a > b C) a = b + 1 D) a < b E) taqqoslab bo'lmaydi sin x +tgx

5. 
   x ning qanday qiymatlarida ifoda musbat bo’ladi? cosx +ctgx
   

A) x B) (-∞; ∞) C) (0; ∞) D) (-∞; 0)

E) x ≠πκ,κ∈Ζ

5

15. 
    n ning qnday qiymatlarida cosnx ⋅ sin x ning davri 3π ga teng? n
    
    1. 
       ±1, ±3, ±5, ±15 B) 1, 3, 5, 15 C)1, 2, 3, 4 D) n = 5k E) n ≠ 5k
       
16. 
    Agar A, B, C uchburchakning burchaklari bo’lsa,
    
    1. 
       B C
       

sin sin sin ≤ a shartni qanoatlantiruvchi a ning eng kchik qiymatini

2 2 2 toping.

A) a = B) a = C) a = D) a = E) a =

15. 
    y = 2sin²x + 4cos²x + 6sinx cosx funksiyaning eng katta va eng kichik qiymatini toping.
    
    1. 
       3− 10; 3+ 10 B) –6; 6 C) − 10 D) –4; 4 E)–2; 2
       

1 ^o

15. 
    Hisoblang: _o − 2sin70
    

2sin10

A) 1 B) C) D) 1,5 E) x

19. 
    y = ₂ funksiyaning eng katta qiymatini toping
    

ax +b bunda: a > 0, b > 0.

1 a

1. 
   B) aniqlab bo'lmaydi C) D) ab E) ab
   

2 ab b

1+x²

19. 
    ifodaning eng kichik qiymatini toping (x ≥ 0).
    

1+ x

A) 2 2 B) 2 C) 2 D) 6 E) 2 + 2

19. 
    ABC muntazam uchburchak ichidan ixtiyoriy P nuqta olinib, undan BC, CA va AB tomonlarga mos ravishda PD, PE va PF
    

PD + PE + PF perpendikulyarlar tushirilgan. ni hisoblang. BD+CE + AF

A) 1: 3 B) 1:1 C) 1:2 D) 2:1 E) 3 :1

19. 
    Agar teng yonli trapetsiyaning balanligi h, yon yomoni esa unga tashqi chizilgan aylana markazidan α burchak ostida ko’rinsa, trapetsiyaning yuzini toping.
    

A) S B) S = h²ctg C) S = h² sin

D) S E) S = h² cosα

19. 
    x² + 1 = log₃ (x +2) + 3 x tenglamaning nechta ildizi bor?
    
    1. 
       2 B) 1 C) 3 D) ∅ E) aniqlab bo'lmaydi
       
20. 
    Hisoblang: sin 47^o + sin61^o – sin11^o – sin25^o
    

A) 1 B) 1/2 C) cos7^o D) 1/2 cos7^o E) sin7^o

19. 
    Hisoblang : cos +cos −cos −cos
    

A) 1/2 B) 1 C) 1/4 D) 1/A E) –1/2

19. 
    Hisoblang: cos 55^o ⋅ cos 65^o ⋅ cos 175^o
    

A) B) C) D) E) −

19. 
    Soddalashtiring: sin ² ( +α)−sin² ( −α)
    

A) sin2α B) cos2α C) (1/2) sin2α D) ( 2 /2) sin2α

E) (1/2)cos2α

19. 
    Agar arctg a + arctg b + arctg c = π bo’lsa , a + b + c ni topung?
    

A) 0 B) 3 abc C) abc D) ab/c B)1

19. 
    Hisoblang: 4arctg − arctg
    

A) π /4 B) π /3 C) π /6 D) π /8 E) π /12

19. 
    Hisoblang: arcsin + 2arctg
    

A) π /4 B) π /3 C) π /6 D) π /8 E) π /2 sin x −cosx

19. 
    y = arctg(arcsin ) funksiyaning aniqlanish sohasini sin x +cosx
    

toping.

A) (πκ; π /2+πκ], κ ∈ Ζ B) [πκ; π /2+πκ], κ ∈ Ζ

C) (πκ; π /2+πκ), κ ∈ Ζ D) [πκ; π /2+πκ), κ ∈ Ζ E) ( -∞; +∞ )

19. 
    Teng yonli uchburchakda r/R munosabat eng katta qiymatga ega bo’lsa, burchaklar qanday qiymatga ega bo’ladi (r, R – ichki, tashqi chizilgan aylanalar radiuslari)?
    
    1. 
       teng tomonli B) to’g’ri burchakli C) aniqlab bo’lmaydi D) uchidagi burchak 120^o E) bunday burchak mavjud emas 33. Uchburchakning balandliklari 12, 15 va 20 ga teng. Bu qanday uchburchak?
       

A) to’g’ri burchakli B) o’tmas burchakli C)aniqlab bo’lmaydi

D) teng yonli E) o’tkir burchakli

34. 
    Berilgan kvadrat ichiga uchlari tomonlarda yotuvchi kvadrat chizilgan. Ularning yuzalarining nisbati 3:2 ga teng. Tomonlar orasidagi burchakni aniqlang.
    

A) 30^o B) 15^o C) 45^o D) 22,5^o E) 60^o

34. 
    a ning qanday qiymatlarini ax² + 2(a +3)x + a +2 = 0 tenglama ildizlari nomanfiy?
    

A) [-2,25; -2] B) [-2,1; -1] C) [1, 2] D) (-∞; -2] E) [-3; -2]

34. 
    Agar a + b = 1 bo'lsa, a⁴ + b⁴ ning eng kichik qiymatini toping. A) 1 B) 1/2 C) 1/4 D) 1/8 E) 1/16
    

x² + ax −2

34. 
    a ning qanday qiymatlarida −3< ₂ < 2 tengsizlik x − x +1
    

x ning barcha qiymatlarida o'rinli bo'ladi?

A) –1<a<2 B) –3<a<2 C) –2<a<1 D) a>0 E) a<0

⎧x² + y² + 2x ≤1

38. ⎨ sistema yagona yechimga ega bo'ladigan a ning

⎩x − y + a = 0

barcha qiymatlarini toping.

A) a = 3; a = -1 B) a = 3; a = 1 C) a = -1 D) a = 1 E) a = 3 39. Agar 2x + 4y = 1 bo'lsa, x² + y² ning eng kichik qiymatini toping.

A) 1 B) 1/10 C) 1/20 D) 1/5 E) 1/15

40. 
    Hisoblang 1 + 2x + 3x² + 4x³ + …+ (n + 1) xⁿ ( x ≠ 1 )
    

1− xn+1 (n+1)xn+1 (n+1)xn+1 1− xn+1 −(n+1)xn+1

A) ₂ − B) ₂ C) ₂

(1− x) 1− x (1− x) (1− x)

1− xn+1

D) ₂ E) hisoblash mumkin emas

(1− x)

40. 
    (4/5)^x = 4 tenglama yechimi qaysi oraliqda yotadi?
    

A) (-∞; -1) B) (0; 1) C) [2; ∞) D) (-1; 0) E) (1; 42. |x| ⋅ (x² – 4) = -1 tenglama nechta ildizga ega?

A) 1 B) 2 C) 3 D) 4 E) ∅

43. cos(lg(2−3^x2 )) = 3^x2 tenglama nechta ildizga ega ?

A) ∅ B) cheksiz ko'p C) 1 D) 2 E) 3

tenglama nechta ildizga ega ?

A) ∅ B) 1 C) 2 D) 4 E) cheksiz ko'p

⎛81⋅2 33⎞ 2

45. Hisoblang: ⎜ + ⎟⋅24,5+ :0,(3)

⎝ 567 77⎠ 3

A) 7,5 B) 15,5 C) 19,5 D) 20,5 E) 17,5