
Последовательности и прогрессия
Authored by Мерей Кенес
Mathematics
11th Grade
Used 8+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Пятый член последовательности 0; 7; 26; 63;... равен
126
124
125
120
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В арифметической прогрессии 55, 51, 47 … определите номер первого отрицательного члена.
12
14
16
15
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Выписано несколько последовательных членов геометрической прогрессии: … ; 150 ; x ; 6 ; 1,2 ; … Найдите член прогрессии, обозначенный буквой x.
15
30
60
45
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Hапишите пятый член последовательности : an = 7/n - если n - четное число, an = (3/n2 )+ 1 - если n - нечетное число
3/25
28/25
8/5
28/5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В геометрической прогрессии известно, что b1 = 2, q = -2. Найти пятый член этой прогрессии.
32
16
-32
-64
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В арифметической прогрессии, состоящей из 20 членов, сумма 10 членов с четными номерами на 100 больше, чем сумма 10 других ее членов. Найдите разность прогрессии.
10
11
8
12
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Дана арифметическая прогрессия: -4, -2, 0, .... Найдите сумму первых десяти её членов.
46
50
54
48
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