Algebra viii-sinf. I-chorak test. A-variant

Algebra VIII-sinf.II chorak testi.D- variant

1. 
   Agar ratsional sonni maxraji … sonining natural darajasidan iborat bo’lsa bu sonni o’nli kasr shaklida tasvirlash mumkin.
   

#1 5 #2 12 #3 2 #4 1 #5 10

2. 
   Ifodaning son qiymatini toping: a³b²c², bunda a= 2 , b= -3 , c= 3 #1 -36 #2 -1 #3 -144 #4 648 #5 0
   
3. 
   Tenglamani yeching: x²+4=0
   

#1 0; 2 #2 0;4 #3 Ildizi yo’q #4 0;3 #5 -4;4

4. 
   Agar a-b ayirma manfiy bo’lsa a son b sonidan … bo’ladi #1 katta #2 kichik #3 teng #4 Hammasi to’g’ri #5 TJY
   
5. 
   Sonlarni taqqoslang: 0,5 va
   

#1 > #2 = #3 < #4 Taqqoslab bo’lmaydi #5 TJY

6. 
   a>b, c-ixtiyoriy son bo’lsa. a+c va b+c uchun to’g’ri tengsizlikni toping #1 a+c=b+c #2 a+c b+c #3 a+c< b+c #4 a+c b+c #5 a+c>b+c
   
7. 
   a>b va c<0 bo’lsa,ac va bc uchun to’g’ri tengsizlikni toping #1 a:cb:c #4 a:c=b:c #5 a:c b:c
   
8. 
   Agar b(1-3a) > a(1-3b) bo’lsa, u holda … bo’ladi #1 a>b #2 a
9. 
   Agar b(1-3a) < a(1-3b) bo’lsa, u holda … bo’ladi #1 a>b #2 a
10. 
    -12>-28 tengsizlikni ikkala qismini -4 ga bo’lish natijasini toping. #1 13<17 #2 -13>-17 #3 -3 <7 #4 3<7 #5 1>
    
11. 
    Tengsizliklarni qo’shing: 3x+y<2x+1 va 3y-2x<14-2y
    

#1 x+4y< 2x-2y+15 #2 4y<2x-2y+13 #3 x+4y<15 #4 x+y<15 #5 x+y<2x-2y+15

12. 
    Tengsizliklarni qo’shing: 3x+y<2x+1 va y-2x<14-2y
    

#1 x+4y< 2x-2y+15 #2 4y<2x-2y+13 #3 x+4y<15 #4 x+y<15 #5 x+y<2x-2y+15

13. 
    Tengsizliklarni ko’paytiring: 4<2x+1 va 3<2x-1
    

#1 28> 8 #2 25<58 #3 x²-4<4 #4 12< 4x²-1 #5 10x-15<27-36x

14. 
    Tengsizlikni qanoatlantiruvchi eng kata butun sonni toping: x< 0 #1 -9 #2 -8 #3 -1 #4 24 #5 -20
    
15. 
    Ifodaning son qiymatini toping a*b²*c³, bynda a= -1,b= -3,c=2 #1 -24#2 -36#3 36#4 24 #5 -72
    
16. 
    3x+y <2x+1 va 3y-2x<14-2a tengsizliklarni qoshishdan hosil boladigan tengsizlik qaysi javobda togri korsatilgan?
    

#1 4y+x<4ax+15#2 4y+x<2x-2a+15#3 4y+x<2x+2a+15#4 4ay+x>4x-15#5 5y+x<4y+x 17.

0,2x > -1 tengsizliklar sistemasining yechimlari bo’lgan barcha butun sonlarni toping.

 x _{ 1} 3

#1 -4 #2 -3 va -4#3 -3 dan kichik sonlar#4 -4 dan kichik sonlar#5 -3 dan katta sonlar

18. tengsizlikni yeching

#1 (1;2]#2 [1;2)#3 [1;2]#4 (- ;1)#5 (- ;1]

19. tengsizlikni yeching 20. y-3x= 55

5x+2y=11 , x²+y² ning qiymatini toping

21.
0,2x > -1 tengsizliklar sistemasining yechimlari bo’lgan barcha butun sonlar yig’indisini toping.

 x _{ 1} 3

22. 
    tengsizlikning musbat butun yechimlari ko’paytmasini toping.
    
23. 
    0 tengsizlikni qanoatlantiruvchi x ning eng kichik musbat butun va eng katta manfiy butun yechimlari yig’indisini toping.
    

22. 
    tengsizlikni e'ng katta va e'ng kichik butun yechimlari ko’paytmasini toping.
    
23. 
    Tenglamani yeching: