Sinf matematika 3-variant

8 – SINF

1. 
   Quyidagi nuqtalarning qaysilari y=3x+7 funksiyaning grafigiga tegishli?
   

1) (0;7) 2) (1;11) 3) (-1;4)
4) (-2;1) 5) (-3;2) 6) (2;10)
A) 1,2,5 B) 2,4,6 C) 1,3,4 D) 3,4,6.

2. 
   y=kx+4 funksiya grafigi M(1;1) nuqtadan o’tadi. k ni toping.
   

A) -3 B) 3 C) -2 D) -4.

3. 
   (x;y) sonlar juftligi sistemaning yechimi bo’lsa, x+y ni toping.
   

A) -4 B) 4 C) -5 D) 5.

4. 
   4ga bo’lganda 3 qoldiq, 10 ga bo’lganda 1 qoldiq chiqadigan va ikkinchi bo’linma birinchi bo’linmadan 13 ta kam bo’ladigan natural sonni top.
   

A) 87 B) 95 C) 83 D) 91.

5. 
   tengsizlikning yechimi bo’ladigan eng kichik butun sonni toping.
   

A) x=2 B) x=-2 C) x=3 D) x=-1.

6. 
   x ning qanday qiymatlarida va kasrlar ayirmasi kasrdan katta bo’ladi?
   

A) B) C) D) .

7. 
   Tengsizlikni yeching: .
   

A) B) C) D) .

8. 
   Ifodani soddalashtiring: .
   

A) B) 5 C) D) .

9. 
   Kasrni qisqartiring: .
   

A) B) C) a+11 D) a-3.

10. 
    Hisoblang: .
    

A) B) C) D) .

11. 
    Kvadraqt tenglamani yeching: x²+7x+6=0.
    

A) x₁=1, x₂=-1 B) x₁=-6, x₂=-1 C) x₁=-7, x₂=-6 D) .

12. 
    Tenglamani yeching: x⁴-4x²-5=0.
    

A) x_1,2= , x_3,4=1 B) x_1,2=5 C) x_1,2= D) .

13. 
    Romb diagonallarining tomonlari bilan hosil qilgan burchaklari kattaliklarining nisbati 2:7 ga teng. Rombning kichik burchagini toping.
    

A) 30⁰ B) 40⁰ C) 50⁰ D) 60⁰.

14. 
    Asoslari 28 sm va 12 sm ga teng bo’lgan trapetsiyaning diagonallari o’rtalarini tutashtiruvchi kesmaning uzunligini toping.
    

A) 8 sm B) 10 sm C) 6 sm D) 7 sm.

15. 
    Har qanday burchakning nechta simmetriya o’qi bor?
    

A) 0 B) 1 C) 2 D) cheksiz ko‘p.

16. 
    Har qanday kesma nechta simmetriya o’qiga ega?
    

A) 0 B) 1 C) 2 D) cheksiz ko‘p.

17. 
    To’g’ri burchakli uchburchaksning katetlari 6 va 8 ga teng. Uning gipotenuzasiga tushirilgan balandligini toping.
    

A) 4,8 B) 5 C) 4,5 D) 4,7.

18. 
    Qavariq to’rtbuchakning diagonallari uni nechta uchburchakka ajratadi?
    

A) 4 B) 5 C) 6 D) 8.

19. 
    Har bir ichki burchagi 156⁰ bo’lgan qavariq ko’pburchakning nechta tomoni bor?
    

A) 10 B) 15 C) 6 D)12.

20. 
    Rombning balandligi 5 ga, diagonallari ko’paytmasi 80 ga teng. Uning perimetrini toping.
    

A) 32 B) 16 C) 24 D) 28.