
Ciągi
Authored by Kamila Gierszewska
Mathematics
1st - 5th Grade
Used 6+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Liczby w podanej kolejności : 6, 13 – a, 8 + a są kolejnymi wyrazami ciągu arytmetycznego. Ile wynosi a?
4
12
1
0
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Liczby 4 , y , 25 w tej kolejności są trzema pierwszymi wyrazami ciągu geometrycznego . Ile wynosi iloraz q tego ciągu?
2,5
-2,5
2,5 lub -2,5
6,25
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dany jest ciąg o wyrazie ogólnym an=-3n+118. Liczba dodatnich wyrazów tego ciągu jest równa:
37
38
39
0
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Ciąg liczbowy cn = n2 + 2n . Suma c2+c3 wynosi :
22
23
24
20
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
W ciągu arytmetycznym dane są: a3 = 13 i a5 = 39.
Wtedy wyraz a1 jest równy?
13
0
-13
26
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Ciąg (48,36,x+2) jest geometryczny. Wtedy
x=18
x=25
x=24
x=27
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Dziewiąty wyraz ciągu arytmetycznego
(an), określonego dla n≥1, jest równy 34, a suma jego ośmiu początkowych wyrazów jest równa 110. Oblicz pierwszy wyraz i różnicę tego ciągu.
a1=−2 oraz r=−4,5
a1=2 oraz r=−4,5
a1=−2 oraz r=4,5
a1=2 oraz r=−4,5
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