9-sinf 2-chorak

9-sinf 2-chorak

1. 
   Funksiyalarning qaysi biri kvadrat funksiya emas?
   

а) х + 2х² ; b) у = х² – 1; c) у = х² + ; d) у = х² – х – 1.
2. у = 2х² + 12х + 15 parabola uchining koordinatalarini toping.
а) (-6;15); b) (-3;-6); c) (3;69); d) (-3;-3).

3. 
   у = 6х – 5х² funksiyaning nollarini toping.
   

3. 
   у = -х² funksiya qaysi oraliqda kamayadi ?
   

3. 
   у = х² - 6х + 8 funksiyaning qiymatlari to‘plamini toping?
   

а) aniqlab bo‘lmaydi;

3. 
   Quyidagi sonlardan qaysilari 3х² – х - 2 > 0 tengsizlikning yechimi bo‘lmaydi?
   

c) 0; d) 1.

3. 
   Tengsizlikni yeching:
   

а) boshqa javob;

3. 
   Tengsizlikni yeching: -4х² + 5х - 1 ≥ 0.
   

3. 
   Tengsizlikni qanoatlantiruvchi х ning eng kichik butun musbat qiymatlarini toping,
   

bunda,
а) 3; b) 2; c) 4; d)1.
10. Ifodaning qiymatini toping:

11. Ifodani soddalashtiring:
а) а^-2; b)а^-1; c) а¹; d) а² .

12. 
    Hisoblang:
    

а)-82; b) –84; c) -86; d) –88.
13. Ifodaning qiymatini toping:
а) -9,8; b) -8,9; c)-9,9; d) 9,9.
14. funksiyaning aniqlanish sohasini toping:

15. 
    Quyidagi mulohazalardan qaysi biri f(х) = funksiya uchun to‘g‘ri ?
    

a) f(х) – toq; b) f(х) – juft; c) juft ham emas, toq ham emas; d) а,b,c lar noto‘g‘ri.

15. 
    f(х) = х¹⁹⁹⁶ va g(х) = х¹⁹⁹⁷ funksiyalar berilgan f(-5), f(2), g(1) va g(-1) o‘sib boorish tartibida yozing?
    

а) g(1), f(2), f(-5) , g(-1); b) f(-5), f(2), g(1), g(-1); c) g(-1), g(1) , f(2), f(-5);
d) f(2), f(-5), g(-1), g(1).

15. 
    у= va у = 6х funksiyaning grafiklarini yasamasdan grafiklarning kesishgan nuqtalarining koordinatalarini toping
    

а) (3;2),(-3;-2); b) (3;2),(-3;2); c) (3;2),(3;-2); d) (2;1),(-2;-1).

15. 
    АBC va А₁ B₁ C₁ uchburchaklar o‘xshash bo‘lib, АB kesma 2sm, BC kesma 3sm va
    

А₁ B₁ kesma 6sm ga teng. B₁ C₁ ni toping_.
а) 2sm; b) 6sm; s) 4sm; d) 3sm.

15. 
    Ikki o‘xshash uchburchaklardan birining tomonlari 7sm, 12sm, 16sm, ikkinchisining tomonlari esa 40sm, 30sm va х sm bo‘lsa, х ni toping.
    

15. 
    CDЕ uchburchakda ЕC = 26 sm, MN CE, bunda M CD, N ED.
    

Agar CM = 8sm va MN = 20sm bo‘lsa CD ni toping

15. 
    Uchburchak tomonlari 5, 6, 8 sonlariga proporsional bo‘lib, unda o‘xshash uchburchakning perimetri 96 sm bo‘lsa, shu uchburchakning tomonlarini aniqlang?
    

15. 
    АBC uchburchaklarida ( C = 90^о), B = 37^о, BC = 8sm bo‘lsa, АC ni toping:
    

23. Agar cosα = bo‘lsa, sinα va tgα ni toping.
24. Agar α =60^о bo‘lsa, sin²α + cos²α ni hisoblang
25. Uchburchakning ikki tomoni 3 sm va 5 sm, bo‘lib, ular orasidagi burchak 60^о ga teng bo‘lsa, shu uchburchakning yuzini toping: