Sonlar juftligi sistemaning yechimi bo`lsa, ni aniqlang

8-sinf 28.01.2022


1. Tengsizlikni yeching:
A) x>0,1 B) x>-0,1 C) x>1 D) x<-1


2. ( ) sonlar juftligi sistemaning yechimi bo`lsa, ni aniqlang.
A)6 B)-4 C. 5 D)-5


3.Ikki xonali sonning raqamlari yig`indisi 9 ga teng. Shu raqamlar bilan teskari tartibda yozilgan son berilgan sondan 27 ta ortiq. Berilgan sonni toping.
A. 72 B. 36 C. 20 D.26


4.Quyidagi ifodalardan qaysi biri −1 ga teng?
A) ((−1)²)³ B)(−(−1)²)³ C)((−1)³)² D)(−(−1)³)³


5. a ning qanday qiymatlarida tenglamalar sistemasi yechimga ega bo`lmaydi.
A. 0 B. 1 C. 2 D.-6


6.Tengsizlikni yeching:
A. B. C. D.


7. Tengsizliklar sistemasining yechimi bo`ladigan eng kichik butun sonni toping: A. x=7 B. x=-7 C. x=-6 D.x=6


8.Agar m > 3, n > 5 va k < 6 bo‘lsa, 3m+ 5n − 2k ning eng kichik butun qiymatini toping.


9.Hisoblang: A) 30 B) C) D)
10.Agar a = ─5, b = ─4 bo’lsa, (a³+a²b+ab²+b³)(a─b) ifodani qiymatini toping.
A) 425 B) 330 C) 369 D) 544

11.Arifmetik progressiyada 10−hadi 7 ga, 7−hadi esa 10 ga teng. Progressiyaning 12−hadini toping.
A) 13 B) 6 C) 14 D) 5

13.Agar 3a = 7b = 6c bo‘lsa, a, b, c sonlarni o‘sib borish tartibida yozing
A)a, b, c B) a, c, b C)c, b, a D) b, c, a


14.Algebraik ifodaning son qiymatini toping.
A. ; B. ; D. ; E. ; F.


15._{  } tenglamalar sistemasini yeching. (x, y ϵN)
A) (48;60) B) (24;36) C) (36;48) D) (60;72)

16. Hisoblang: .

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


17.Agar x² + px + 4 = 0 tenglama berilgan bo’lsa, p ning nechta butun qiymatida tenglama ildizlariga ega emas?
A) 3 B) 5 D) 6 E) 7


18.Hisoblang: .
A) -3 ` B) -4 C) 4 D) 3
19.Qonuniyatda navbatdagi sonni aniqlang 2, 6, 30, 210, …
A)4080 B)1975 C)1890 D)1960
20.Ifodaning qiymatini toping: .
A) –0,138; B) 22,9; C) 2,92; D) 2,32.

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