Прогресії. Тест. 9 клас
Quiz
•
Mathematics
•
9th Grade
•
Medium
Olena Domotska
Used 73+ times
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12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Яка з наведених послідовностей є арифметичною прогресією?
-2; 1; 5; 10; ...
5; 10; 20; 40; ...
7; 0; -7; -14; ...
11; 13; 15; 18; ...
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Знайдіть п'ятий член арифметичної прогресії n, якщо a3 = -20, a4 = -17
-23
-10
-14
-21
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Знайдіть a11, якщо a1=3, d =4
31
39
43
40
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Арифметична прогресія задана формулою n-го члена an=8-5n. Знайти a20
-92
60
-108
108
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Знайдіть перший від'ємний член арифметичної прогресії (an): 26; 16; ...
-1
-2
-4
-6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Дано арифметичну прогресію (an). Знайдіть a6 , якщо a5 =16, a7 = 24
20
18
22
40
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(bn) - геометрична прогресія. b15 = 8, b16 = 32. Знайти q
4
-4
24
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