
test progresii
Authored by Lilla Pellegrini
Mathematics
9th - 12th Grade
Used 68+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Care este suma termenilor din șirul 5, 10, 15, 20, 25, 30, 35, 40, 45, 50
275
325
450
425
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
O progresie aritmetică are rația 9 și termenul al 41-lea este 25. Care este formula termenului general?
a(n) = -344 + 9n
a(n) = -335 + (n - 1)d
a(n) = -344 - 9n
a(n) = -335 + 9n
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Al șaptelea termen al progresiei geometrice 2, 6, 18, ... este:
5832
2919
1458
729
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dacă a, G, b sunt în progresie geometrică, atunci ‘G’ este:
media aritmetică a lui a și G
media geometrică a lui G și B
media geometrică a lui a și b
media aritmetică a lui a și b
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Într-o progresie geometrică termenul al 4-lea este 9 iar al șaselea termen este 16. Al cincelea termen din această progresie este:
15
12
10
11
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Media aritmetică a lui
5
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dacă x -1 și x + 7 sunt primul și al treilea termen dintr-o progresie aritmetică, atunci al doilea termen este:
x + 4
x - 3
x + 3
x - 4
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