8-sinf iv-blok 1-variant 2018-2019 o’quv yili ii-chorak Tarix

8-sinf IV-blok 1-variant 2018-2019 o’quv yili II-chorak



Matematika
1. a<0 va b>0 bo`lsa quyidagi ifodalardan qaysi birining qiymati manfiy?
A) a²b³ B) ba C) ab D) b+a²
2. a<0 va b>0 bo`lsa quyidagi ifodaladan qaysi birining qiymati musbat?
A) a³b³ B) b+a C) ab D) ba²
3. Tenglamani yeching:
A) x=3; B) x₁= 4; x₂=3
C) x= 4 D) x₁= 3; x₂=4
4. Tengsizliklarni qo'shing:
4,1 > 1,3 va 2 > 4
A) 6,1 > 5,3 B) 4,3 > –1,7
C) 4,2 > 2,3 D) 6,1 < 5,3
5. n4 tengsizlikning butun sondan iborat eng kichik yechimining ikkilanganini toping.
A) –5 B) –4 C) –3 D) 0 E) 1
6. Algebraik tengsizlik ko'rinishida yozing: "x va –2 sonlari yig'indisi 3 dan kichik emas."
A) x+23 B) x–23 C) x–32 D) x–23
7. x–4 tengsizlining eng katta butun yechimini toping.
A) –3 B) –4 C) –5 D) 0
8. x>–6 tengsizlikning eng kichik butun yechimini toping.
A) 0 B) –7 C) –6 D) –5
9. 2; 3,9; 4; 4,3; 5 sonlaridan qaysilari 3x–2x+6 tengsizlikning yechimi bo’ladi?
A) 2; 3,9; 4 B) 4 C) 4; 5 D) 4; 4,3; 5
10. 2,5x+50 tengsizlikni yeching.
A) x2 B) x–2 C) x–2 D) x2
11. Tenglamalar sistemasini yeching:
Javob: ___________________________
12. (x;y) sonlar juftligi tenglamning yechimi bo`lsa, yx ni toping.
Javob:__________________________
13. Birinchi darajali ikki noma’lumli ikkita tenglama sistemasini yechishning qanday usullari bor?
Javob:__________________________
14. xy+5=0 to`g`ri chiziqning koordinata o`qlari bilan kesishish nuqtalarining koordinatalarini toping.
Javob: __________________________
15. y=2x+1 va y= x+1 funksiyalar grafiklarining kesishish nuqtasining koordinatalarini toping.
Javob:__________________________