
Способы задания последовательности
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Назгуль Досымбекова
FREE Resource
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22 questions
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1.
FLASHCARD QUESTION
Front
Дана последовательность, заданная аналитически: an = 5n−3. Найдите пятый член (a5) этой последовательности.
Back
a) 22 b) 25 c) 28 d) 10
2.
FLASHCARD QUESTION
Front
Какая аналитическая формула задает последовательность 4,8,12,16,…?
Back
a) an = n+3 b) an = 4n c) an = n4 d) an = 4n+4
3.
FLASHCARD QUESTION
Front
(Словесный способ) Последовательность состоит из натуральных чисел, кратных 10. Какое число стоит на 4-м месте?
Back
a) 10 b) 40 c) 100 d) 4
4.
FLASHCARD QUESTION
Front
Верно ли, что аналитический способ (формула n-го члена) позволяет найти любой член последовательности, не зная предыдущих?
Back
a) Да b) Нет
5.
FLASHCARD QUESTION
Front
(Функциональная грамотность) Вклад в банке "Alga" в первый месяц составил 10 000 тенге. Каждый следующий месяц он увеличивается на фиксированную сумму в 2 000 тенге (простой процент). Какая формула задает сумму вклада an на n-й месяц?
Back
a) an = 10000⋅(2000)n b) an = 10000+(n−1)⋅2000 c) an = 10000+2000n d) an = 12000n
6.
FLASHCARD QUESTION
Front
Последовательность задана рекуррентно: a1 = 3 и an+1 = 2an + 1. Найдите a3.
Back
a) 7 b) 15 c) 10 d) 9
7.
FLASHCARD QUESTION
Front
Какая рекуррентная формула задает последовательность 50,45,40,35,…?
Back
a) a1 = 50, an+1 = an + 5 b) a1 = 50, an+1 = an − 5 c) an = 50−5n d) a1 = 50, an+1 = an ⋅ 0.9
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