
Wzór ogólny ciągu arytmetycznego i geometrycznego
Authored by Magda Król
Mathematics
12th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wzór na 120 wyraz ciągu arytmetycznego ma postać
a120 = a1 + 120r
a120 = a1 - 120r
a120 = a1 + 119r
a120 = a1 - 119r
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pierwszy wyraz ciągu arytmetycznego o różnicy r=-5 jest równy 5. Oblicz dziesiąty wyraz ciągu.
35
-40
20
-35
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Ciąg (24,18,x+8) jest arytmetyczny. Wtedy:
x=4
x=2
x=-2
x= -6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Oblicz różnicę ciągu arytmetycznego, w którym
2
-2
0,5
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Liczby 7, a, 49 w podanej kolejności tworzą ciąg arytmetyczny.
Wtedy a jest równe:
14
21
28
42
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dany jest ciąg arytmetyczny (an), określony dla n≥1, o którym wiemy, że: a1=2 i a2=9. Wtedy an=79 dla
n=10
n=11
n=12
n=13
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oblicz różnicę ciągu arytmetycznego -8, -3, 2 .... i określ jego monotoniczność
r = 3, ciąg rosnący
r = -5, ciąg rosnący
r = 5, ciąg rosnący
r = 5, ciąg malejący
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