8-sinf. Testlar. I variant

8-sinf. Testlar. II variant.

1. у = - 1,5х - 5 funksiya berilgan. Agar у = 1 bo‘lsa , х ning qiymatini toping.

A) -1,5; B) -4; C) -2; D) 1,5.

2.Guruhlash usuli bilan ko‘paytuvchilarga ajrating:

ах – ау + 5х – 5у.

A) (х + у)(а + 5); B) (х - у)(а + 5); C) (х - у)(а - 5); D) (х + у)(а - 5).

3. у = -3х + 1 to‘g‘ri chiziqning ordinata o‘qi bilan kesishgan nuqtasinig koordinatalarini toping.

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

4. Ordinata o‘qiga nisbatan simmetrik nuqtalar juftini toping

A) А(5;3) va В(-5;3); B) А(1;3) va В(3;1); C) А(-1;3) va В(3;-1); D) А(0;1) va В(1;0).

5. Funksiya S(t) = -2t + 3 formula bilan berilgan bo‘lsa S(2) ni toping.

A) –2; B) 2; C)- 1; D) 0.

6.. Ifodaning son qiymatini toping. a =-2; b=-1; c =-3 a b² c²₌

A) -18 B) 9 C) 12 D) -12

7. Tenglamani yeching. (x+4) (x+5)=0

A) -4.5 B) -4; -5 C) 5; 4 D) 4 ; - 5

8 Tengsizlikning ikkala qismiga -7 ni qo`shing: -2<4

A) -9<-3 ; B) 7<9; C) 3<7 D) -9≤ -3;

9. Tengsizlikning ikkala qismini ko`rsatilgan songa ko`paytiring:

3.8>2.4 ni 5 ga

A) 15>20; B) 19>12; C) -12<14 ; D) 19>12

10. Tengsizlikni qo`shing: -8<2 va 3<5

A) -5<7; B) -8<5; C) -5<8 ; D) 5<7;

11. Ifodani son qiymatini toping. a=-1; b=-3; c=2; a³ b² c² =

A) 18; B) -36; C) 46; D) -18;

12. Tenglamani yeching. (x-2) (x+3)=0

A) 2; 3 . B) 2; -3. C) -2; -3 . D) -2, 3 ;

13.Qavariq beshburchakning burchaklari kattaliklari 2:3:4:5:6 kabi nisbatda. Burchaklardan kattasining miqdorini toping.

1. 
   136°; B) 162°; C) 156° ;D) 148°
   

14 To`g`ri to`rtburchakning eni 5 ga teng, bo`yi undan 7 ga ortiq. Shu to`g`ri to`rtburchakning perimetrini toping.

1. 
   34; B) 32; C) 24; D) 26;
   

15.Teng yonli prapetsiyani perimetri 36 sm, o`rta chizig`i 10 sm. Yon tomonining uzunligini toping.

1. 
   10 sm; B) 8 sm; C) 9 sm; D) 12 sm;
   

16.Trapetsiyaning kichik asosi 4 sm, o`rta chizig`i katta asosidan 4 sm qisqa. Trapetsiyaning o`rta chizig`ini toping.

1. 
   6 sm; B) 10 sm; C) 9 sm; D) 8 sm;
   
2. 
   
   

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

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

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

2. 
   40; B) 30; C) 80; D) 60;
   

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

Javob :

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

Javob :

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

Javob :

22. y=-2x+b funksiya grafigi (-2;3) nuqtadan o`tadi. b ni toping.

Javob :

23. Agar to`g`ri to`rtburchakning tomonlari 4 marta orttirilsa, uning yuzi necha marta ortadi?

Javob :

24. To`g`ri to`rtburchakning perimetri 32 ga, qo`shni tomonlarining ayirmasi 2 ga teng. Uning tomonlarini toping.

Javob :

25.АВС teng yonli uchburchakda (АВ = ВС) tashqi burchak ВСК 150° ga teng. АВС burchakni toping.

Javob :

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

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

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

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

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

___________________

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

___________________

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

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

19 . f(-2)=12.

20 . y(3)=-12 21. (0;-5) va (-3/5;0)

22 . b=-1 23. 16 marta

24 . a=9, b=7. 25 . 120°.

26. D

27. B

28. (-4;2]

29. x<1

30. 2

8-sinf uchun I bosqich bilimlar bellashuviga matematika fanidan yozma ish.

II variant

1. 
   a ning istalgan qiymatida tengsizlik o`rinli bo`lishini isbotlang;
   

(a+7)(a+1)<(a+2)(a+6)

2. 
   Tenglamalar sistemasini yeching;
   

3.34m Marg`ilon adrasidan 5 ta ayollar va 3 ta qiz bolalar ko`ylagi tiksa bo`ladi. Agar 2 ta ayollar ko`ylagi ucun 3ta qizlar ko`ylagiga qaraganda 1 m ortiq adras ketsa, bitta ayol va bitta qiz bola ko`ylagini tikish uchun necha metrdan adras zarur bo`ladi

4.Uchburchakning uchlari A(-2;1), B(1;5) va C(4;-2) nuqtalarda yotadi. Bu uchburchakga koordinata boshiga nisbatan simmetrik bo’lgan uchburchak uchlarining koordinatalatini toping va chizing.
5.Uchburchak tomonlari nisbati 6:8:10 kabi, perimetri 120 sm. Uchlari berilgan uchburchak tomonlarining o`rtalarida bo`lgan uchburchakning perimetrini va tomonlarini toping.

8-sinf uchun I bosqich bilimlar bellashuviga matematika fanidan yozma ish.

III variant

1.