
7 вариант (9 класс)
Authored by B B
Mathematics
9th Grade
Used 4+ times

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13 questions
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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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