7 вариант (9 класс)

7 вариант (9 класс)

9th Grade

13 Qs

quiz-placeholder

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7 вариант (9 класс)

7 вариант (9 класс)

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Medium

Created by

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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Сопоставьте члены прогрессии с последовательностями

K) 3;7;11;15…

N) 2;4;8;16…

M) 1;7;13;19…

R) 64

X) 63

L) 61

K=R; N=X; M=L

K=L; N=R; M=X

K=X; N=R; M=L

K=X; N=L; N=R

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

При каких значениях a будет соблюдаться арифметическая прогрессия в a;a+7;10

-8

-4

4

6

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Дана формула an=n2-8n, найдите член арифметической прогрессии с самым маленьким значением

n=3

n=5

n=4

n=2

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Если b1=2,5 q=2, найдите 5 первых членов геометрической прогрессии

2,5;5;7,5;15;22,5

2,5;5;7,5;10;10,5

2,5;5;7,5;15;30

2,5;5;10;20;40

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Дана формула a1=2, a2=1, an+2=-3(an-1)2-an+1. Расставьте a3,a4,a5 в порядке возрастания

a5,a3,a4

a3,a5,a4

a3,a4,a5

a4,a5,a3

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

25;21;17;13;8;14;22. Найдите 4 члена прогрессии.

14;17;22;25

8;13;17;22

13;17;21;25

8;14;22;25

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Найдите третий член прогрессии. an=(n+1)2

12

16

9

4

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