8-sinf. Testlar. I variant

8-sinf. Testlar. I variant.

1. у = - 0,5х + 3 funksiya uchun у = - 1 da x ning qiymati toping:

A) 10,2; B) 7,5; C) 8; D) 9.

2. у = 3х – 1 funksiyaning abscissa o‘qi bilan kesishgan nuqtalarning koordinatalarini toping:

A) (0; -1); B) (1; 0); C) (-1; 0); D)(1/3;0)

3. A(1;2) nuqtaga Ox o’qiga nisbatan simmetrik nuqtani toping:

A) A(1;-2) B) A(-1;-2) C) A(-1;2) D) A(2;1)

4. а > b ekanligi ma’lum bo‘lsa, to‘g‘ri tengsizlikni aniqlang?

A) b + 2 > a + 2; B)-1,2a < - 1,2b; C) 0,19 a< 0,19b; D) a+2

5. To‘g‘ri tasdiqni aniqlang..

A) Agar, а > 5, b > 7, bo‘lsa а + b > 10; B) Agar а < 7, b < 3, bo‘lsa аb < 21;

C) Agar, а > 4, b > 6, bo‘lsa аb < 21; D) Agar, –12 < а < 10, bo‘lsa –10 < 2а < 12.

6. Qo‘sh tengsizlikni qanoatlantiruvchi n ning eng katta butun qiymatini toping, bunda

-4 ≤ n < 4. A) –4; B) 3; c) 4; D) 0.

7. Yigindisi 82 ga teng bolgan,ayirmasi 38 ga teng bolgan 2 ta son toping.

А) 60,22 Б) 79,82 С) 50,48 Д) 70,12

8.x=4 funksiya grafigi qaysi choraklarda yotadi?

A) I, II B) II, III C) I, III D) I, IV

9.Tanlash yo’li bilan tenglamalar sistemasining yechimlarini toping

x+y=14

xy=40 A) x=4, y=10 B) x=-4, y=36 C) x=2, y=20 D) x=7, y=2

10.To’g’ri chiziqning koordinata o’qlari bilan kesishish nuqtalarining koordinatalarini toping: y=x+3.

A) (3;0), (-3;0) B) (0;0),(-3;0) C) (0;3), (-3;0) D) (0;3),(3;0)

11. Funksiya S(t) = 2t + 3 formula bilan berilgan. S(-2) ni toping.

A) – 3; B) 2; C) 1; D) –1.

12. у = -0,5х + 2 va у = -3 + 2х funksiyalar grafiklarining kesishgan nuqtasining koordinatalarini toping. A)(-2; -1); B)(-2; 1) ; C)(2; 1); D)(1; -2).

13. Qavariq 8 burchak bir uchidan chiquvchi dioganallar uni nechta uchburchakka ajratadi?

1. 
   6 ta B) 8 ta C) 5 ta D) 7 ta
   

14. Pаrallelogrammning 8 smli tomoniga o‘tkazilgan balandligi 6 sm ga teng bo‘lsa, 12 sm li tomonga o‘tkazilgan balandligini toping.

2. 
   6 B) 8 C) 4 D) 12
   

15. Agar to‘g‘ri to‘rtburchakning bir tomoni ikkinchisidan ikki marta ortiq bo‘lib perimetri 36 sm bo‘lsa, uning yuzini toping.

A)72; B) 36; C) 18; D) 144;

16.Trapetsiyaning yuzi 30 ga, balandligi 6 ga teng bo`lsa, uning o`rta chizig`i qanchaga teng bo`ladi?

1. 
   2,5; B) 5; C) 7,5; D) 4,5;
   

17.Yuzi 144 sm², balandliklari 8 sm va 12 sm bo`lgan parallelogrammning perimetrini toping.

A)40; B) 30; C) 80; D) 60;

18. Qanday n da qavariq n burchakning barcha burchaklari to’g’ri bo’ladi?

A) 3 B) 4 C) 5 D) 6

19.Qo’shtengsizlikni sonli oraliq orqali yozing: -4

20. . Tengsizlikni yeching: 3(х+1) < х+5

___________________

21.Berilgan sonli oraliqqa tegishli х sonlar to’plamini qo’sh tengsizlik ko’rinishida yozing: (2;5) . ___________________

22 .y=-5x+3 funksiya formula bilan berilgan . f (3) ni toping. ___________________

23. Parallelogrammning bir tomoni ikkinchisidan to‘rt marta kam bo‘lib, perimetri 25 sm bo‘lsa, uning tomonlarini aniqlang. ___________________

24.Rombning burchaklaridan biri ikkinchisidan 30^о ortiq bo‘lsa, uning rombning barcha burchaklarini aniqlang. _________________________

25. ABC uchburchakning tomonlari 7 sm, 8 sm va 10 smga teng bo‘lib, barcha o‘rta chiziqlari o‘tkazilgan. O‘rta chiziqlardan hosil bo‘lgan uchburchakning perimetrini aniqlang . ___________________________________

26.Qo‘shni burchaklardan biri ikkinchisidan 30° ga katta. Bu burchaklarni toping.

A) 75°; 105° B) 65°; 115° C) 85°; 95° D) 55°; 125°.

27.Yuzi 144 sm², balandliklari 8 sm va 12 sm bo`lgan parallelogrammning perimetrini toping.

1. 
   40; B) 30; C) 80; D) 60;
   

28 . Fuksiya f( x) =2-5x formula bilan berilgan . f (-2) ni toping .

Javob :

29 .y=-5x+3 funksiya formula bilan berilgan . y(3) ni toping.

Javob :

30 .y=-3x-5 funksiya grafigining koordinata o`qlari bilan kesishish nuqtalari koordinatalarini toping:

Калит 1-вариaнт

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
C	D	A	B	A	B	A	D	A	C	D	C	D	C	A	B	D	B

19. (-4;2]

20. x<1

21. 222. -12

23. 2,5 sm,10 sm.

24, 75°,105°,75°,105°

25. p₁=12,5 sm.

26. A

27. D

28 . f(-2)=12.

29 . y(3)=-12

30. (0;-5) va (-3/5;0)