
арифметическая прогрессия
Authored by Марина Зайцева
Mathematics
9th Grade
Used 6+ times

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5 questions
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1.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Последовательность ( ) задана формулой Найдите пятый член этой последовательности.
-15
35
15
-5
2.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Первый член и разность арифметической прогрессии ( ) равны соответственно 2 и -3. Найдите шестой член этой прогрессии.
13
17
-13
16
3.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Второй член арифметической прогрессии ( ) равен 4, а шестой член равен 14. Найдите разность этой прогрессии.
2,5
2
3
3,5
4.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Найдите сумму десяти первых членов арифметической прогрессии, если первый член равен 2, а разность прогрессии равна 4.
220
100
400
200
5.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Дана арифметическая прогрессия 3; 2,8; 2,6;... Сколько в этой прогрессии положительных членов
14
15
16
13
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