
Ciągi
Quiz
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Easy
Dominika 1
Used 3+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
Liczby 𝑥, 𝑦, 𝑧, których suma jest równa 114, tworzą w podanej kolejności ciąg geometryczny. Liczby te są również wyrazami pewnego ciągu arytmetycznego (𝑎𝑛), gdzie n≥1, w którym 𝑥=𝑎1, 𝑦=𝑎4 i 𝑧=𝑎25. Wówczas:
𝑥 = 38, 𝑦 = 38, 𝑧 = 38 oraz 𝑥 = 2, 𝑦 = 14, 𝑧 = 98
𝑥 = 38, 𝑦 = 38, 𝑧 = 38
oraz 𝑥 = 2, 𝑦 = 14, 𝑧 = 98
2.
MULTIPLE CHOICE QUESTION
10 mins • 2 pts
4 wyrazów.
5 wyrazów.
6 wyrazów.
7 wyrazów.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Ciąg (x,2x+3,4x+3) jest geometryczny. Pierwszy wyraz tego ciągu jest równy:
-4
1
0
-1
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
16
5
9
4
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
6.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
Dany jest rosnący ciąg arytmetyczny (𝑎𝑛) określony dla każdej liczby naturalnej 𝑛≥1. Ciąg (𝑎1⋅𝑎2 , 𝑎2⋅𝑎3 , 𝑎3⋅𝑎1) jest geometryczny i ma wyrazy różne od zera. Iloraz tego ciągu geometrycznego wynosi:
q =2.
q =−1.
q =−2.
q =1.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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