Mаtеmаtikа 9-sinf 1- variant 1-chorak

Mаtеmаtikа 9-sinf 1- variant 1-chorak

1. 
   Funksiyalarning qaysilari kvadrat funksiya? а) х + 2х² – 3; b) у = х² – х³;
   
2. 
   с) у = 5х – 1; в) у =
   

3. 
   у = -2х² + 8х – 13 parabola uchining koordinatalarini toping. а) (2;-5); b) (-2;-9); c) (2;-7); d) (2;5).
   

4. 
   у = -9х + 7х². funksiyaning nollarini toping.
   

5. 
   у = х² funksiya qaysi oraliqda o‘sadi?
   

6. 
   у = - х² +6х – 1 funksiyaning aniqlanish sohasini toping.
   

а) aniqlab bo‘lmaydi;

7. 
   Quyidagi sonlardan qaysilari 3х² – х + 2 > 0 tengsizlikning yechimi bo‘ladi?
   

а) 2; b) –1; c) 1,2; d) a-b-c lardagi barcha sonlar.

8. 
   Tengsizlikni yeching: а) yechimi yo‘q;
   

9. 
   Tengsizlikni yeching: 3х² – 5х + 2 ≥ 0.
   

10. 
    Tengsizlikni qanoatlantiruvchi х ning butun musbat qiymatlarini toping,
    

bunda, а) 0; b) 1; c) 4; d) 2.

10. Ifodaning qiymatini toping: а) 2,5; b) 1,75; c) 1,25; d) 2,25.

11. Ifodani soddalashtiring: а) m^-2; b)m^-3; c) m²; d) m³ .

12. 
    Hisoblang: а)-27; b) –26; c) 30; d) –30.
    

13. Ifodaning qiymatini toping: а) 10,06; b) 12,06; c)11,06; d) 11,6.

14. 
    funksiyaning aniqlanish sohasini toping.
    
15. 
    Quyidagi mulohazalardan qaysi biri f(х) = funksiya uchun to‘g‘ri?
    

a) f(х) – juft; b) f(х) – toq; c)juft ham emas, toq ham emas:

14. 
    f(х) = х¹⁹⁹⁷ va g(х) = х¹⁹⁹⁸ funksiyalar berilgan f(-1), f(1), g(-6) va g(3) qiymatlarini kamayish tartibida yozing. а) g(3), f(1), g(-6), f(-1) ; b) f(-1), f(1), g(-6), g(3); c) g(-6), f(1), g(3), f(-1);
    

d) g(-6), g(3), f(1), f(-1).

14. 
    у= va у = 2х funksiyaning grafiklarini yasamasdan grafiklarning kesishgan nuqtalarining koordinatalarini toping а) (2;4),(-2;-4); b) (2;4),(-2;4); c) (2;4),(2;-4); d) (2;1),(-2;-1)
    

14. 
    АBC va A₁B₁C₁ uchburchaklar o‘xshash bo‘lib, АB kesma 5sm, BC kesma 7sm, A₁B₁ kesma 10sm bo‘lsa, B₁C₁ ni toping. а) 12 sm; b) 16sm; c) 14sm; d) 10sm.
    

14. 
    Ikki o‘xshash uchburchaklardan birining tomonlari 6sm, 8sm va 13 sm, ikkinchisi – 12sm, 9sm va х sm bo‘lsa, х ni toping. а) 17,5sm; b) 15sm; c) 17sm; d) 19,5 sm.
    

14. 
    MKР uchburchaklarda MР = 24 sm, DЕMР, bunda DMK, ЕРK.
    

agar DM = 6sm, DЕ = 20sm bo‘lsa MK ni toping.. а) 32sm ; b) 25sm; c) 36sm; d) 24sm.

14. 
    Uchburchak tomonlari 3, 4, 6 sonlariga proporsional bo‘lib, unda o‘xshash uchburchakning perimetri 58, 5 sm bo‘lsa, shu uchburchakning tomonlarini aniqlang?
    

а) 12,5sm, 19sm; 27 sm; b) 13,5sm; 17sm; 28sm; c) 13,5sm; 18sm; 27sm; d) 13,5sm, 20sm. 25sm.

22 . Tengsizliklar sistemasini yeching:

a)(-2; -2) b) (2; -2) v) (-1; 1) g)(1; -1)

23. Grafigi rasmdagi to'g'ri chiziq bilan tasvirlangan funksiyani formula bilan yozing.

A.y=-2x B. y=2x C. y=0,5x D. y=4x

24. Quyidagi shaklda qaysi kvadrat tengsizlik yechimi aks ettirilgan?

A) x² -4x+3>0 B) x² -4x+4< 0 C) x² +3x-4>0 D) x² +3x+4>0

25. 25. Quyidagi shaklda qaysi funksiya grafigi aks ettirilgan?

A)y= | x | B) C)y-x² D) y=kx+b