
Ciąg arytmetyczny - test
Authored by Joanna sd
Mathematics
12th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Liczby 7, a,49 w podanej kolejności tworzą ciąg arytmetyczny. Wtedy a jest równe:
14
21
28
42
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Liczby 2,−1,−4 są trzema początkowymi wyrazami ciągu arytmetycznego (a n ). Wzór ogólny tego ciągu ma postać:
a n =−3n+ 5
a n =n−3
a n =−n+ 3
a n = 3n−5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
W ciągu arytmetycznym (a n ), dane są a 1 = 5, a 2 = 11. Wówczas:
a 14 = 71
a 12 = 71
a 11 = 71
a 10 = 71
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
W ciągu arytmetycznym (a n ) dane są: a 3 = 13 i a 5 = 39. Wtedy wyraz a 1 jest równy:
13
0
−13
−26
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ciąg arytmetyczny (a n ) jest określony wzorem a n =−2n+ 1. Różnica tego ciągu jest równa:
−1
1
−2
3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dany jest ciąg arytmetyczny (a n ) w którym różnica r =−2 oraz a 20 = 17. Wówczas pierwszy wyraz tego ciągu jest równy:
45
50
55
60
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
W ciągu arytmetycznym (a n ) dane są a 2 = 11 i a 4 = 7. Suma czterech początkowych wyrazów tego ciągu jest równa:
36
40
13
20
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