
Прогресії. 9 клас
Authored by Olena Domotska
Mathematics
9th Grade
Used 10+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
В арифметмчній прогресії (аn) а1= -6; а2= -3. Чому дорівнює десятий член арифметичної прогресії?
12
18
24
21
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Чому дорівнює сума перших двадцяти членів арифметичної прогресії, якщо а1= -40; а2= -35.
150
95
105
50
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Обчислити суму перших 12-ти членів арифметичної прогресії -10; -8; -6; -4; -2; ...
0
12
22
26
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В арифметичній прогресії (аn) а1= -4; а2= -6. Чому дорівнює різниця арифметичної прогресії?
2
-2
6
-4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Формулою n-го члена арифметичної прогресії 7, 9, 11, … є
2n+5
2n+3
3n+1
2n+1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Знайдіть знаменник геометричної прогресії (bn), якщо ,
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Знайдіть різницю арифметичної прогресії, якщо a1 = 7, a16 = 67.
-4
4
2
-2
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