8-sinflar uchun matematika fanidan testlar

8-sinflar uchun matematika fanidan testlar
1.Algebraik ifodaning son qiymatini toping:

S = 2 (ab + ac + bc) , bunda a= 5, b=3 c= 6;

a) 126 b) 63 s)162 d) 156

2. Tenglamani yeching: 2 x + 15 = 3 x – 11

a) 27, b) 65, s) 26, d) 43

3Tekislikda to’g’ri burchakli koordinatalar sistemasidan foydalanish kimning nomi bilan bog’liq ? a) Fales, b) Rene Dekart, s) Pifagor d) a yoki b

4. Agar nuqta absissalar o’qida yotsa, u holda uning ordinatasi nimaga teng bo’ladi?

a) 4 ga, b) -1 ga s) nolga, d) 5 ga.

5. y = 5 x funksiyada qaysi biri erkli o’zgaruvchi bo’ladi?

a) x , b) y, s) 5, d) 5 x

6. Funksiya qanday usullarda berilishi mumkin?

a) analitik, , b) grafik, jadval, s) analitik, grafik, jadval, d) jadval, analitik.

7. Funksiya y (x) = 5x + 6 formula bilan berilgan. x= -3 bo’lganda y ning qiymatini hisoblang: a) 9 b) -6 s) -15 d) -9

8. y = 2 x funksiya grafigi qaysi choraklardan o’tadi?

a) I va II b) II va III s) III va IV d) I va II

9. Chiziqli funksiya qanday ko’rinishda beriladi?

a) y= kx + b b) y= k x ² + b s) y= k x ³ + b d) y= k x ⁴ + b

10. Quyidagi nuqtalarning qaysilari y=3x+7 funksiya grafigiga tegishli:

a) (0:7), (-1:4),(-2;1) b) (0:5), (-2:4),(-2;4) s) (1:7), (-1:7),(-5;1) d) (0:4), (-1:4),(-7;1)

11. y=-2x-1 funksiya grafigi qaysi chorakda yotadi.

a) I,II,III b) I,III,IV s) I,II, IV d) II,III,IV

12. y=kx+4 funksiya grafigi M(1: 1) nuqtadan o`tadi. k ni toping.

a) -3 b) 3 s) -2 d) 4

13. y=-2x+b funksiya grafigi M(-1:7) nuqtadan o`tadi. b ni toping

a) 1 b) 5 s) 8 d) 0

14.Ikkita musbat sonning yig`indisi qanday son bo`ladi?

a) manfiy b) natural s) musbat d) kasr son

15. musbat son bilan manfiy sonning ko`paytmasi qanday son bo`ladi?

a) manfiy b) natural s) musbat d) kasr son

16. agar a>b bo`lsa, b-a qanday son bo`ladi?

a) manfiy b) natural s) musbat d) kasr son

17. n sonining tengsizlikni qanoatlantiruvchi eng katta butun qiymatini toping: n<-5,6

a) -7 b) -6 s) -8 d) -9

18. n sonining tengsizlikni qanoatlantiruvchi eng kichik butun qiymatini toping: n> 7,8

a) 9 b) -8 s) 3 d) 8

19. Uchburchakning tomonlari mos ravishda 73 sm, 1m 15 sm va 1m 11 sm dan kam. uning perimetri 3m dank am ekanini isbotlang.

20. agar a>3 , b>5 bo`lsa u holda 2a+3b > 21 ekanini isbotlang.

21. To`g`ri to`rtburchak ichida yotgan ixtiyoriy nuqtadan uning uchlarigacha bo`lgan masofalar yig`indisi shu to`g`ri to`rtburchakning yarim perimetridan katta ekanini isbotlang.

22. -2<-4 tengsizlikning ikkala qismiga -15 sonini qo`shish natijasida hosil bo`ladigan tengsizlikni yozing.

23 2a+3b>a-2b tengsizlikning ikkala qismiga -2a sonini qo`shish natijasida hosil bo`ladigan tengsizlikni yozing.

24. a

25. Tengsizliklarni ko`paytiring:

x-2>1 va x+2>4

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
a	s	b	s	a	s	d	d	a	a	d	a	b	s	a	a	b	d

Izoh: 1-13 gacha I-chorak

14-25 gacha II- chorak