Odobnoma fanidan 4-sinflar uchun test savollari I variant

8-sinf 1 blok matematika 1-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 B) 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.Qo’shtengsizlikni sonli oraliq orqali yozing: -4

12.Tengsizlikni yeching: 3(х+1) < х+5

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

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

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