
TEST -progresii aritmetice și progresii geometrice
Authored by NICOLETA VELICEA
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9 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 10 pts
Primii cinci termeni ai unei progresii aritmetice care are primul termen 1 şi ratia 3 sunt:
2.
MULTIPLE SELECT QUESTION
30 sec • 10 pts
O progresie geometricã are primul termen 3 şi ratia 2. Al şaselea termen al progresiei este:
3.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Să se afle raţia unei progresii aritmetice dacă al cincilea termen este 42 şi al unsprezecelea termen este 90.
4.
MULTIPLE SELECT QUESTION
30 sec • 10 pts
Să se determine valoarea lui x astfel încât numerele x+1, 2x – 3 şi x – 3 să fie în progresie aritmetică.
5.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Suma 1+5+9+...+77 are valoarea:
6.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Urmãriţi cu atenţie videoclipul şi precizaţi cat este al zecelea termen al progresiei.
38
22
26
44
7.
MULTIPLE CHOICE QUESTION
30 sec • 15 pts
Aflaţi primul termen şi raţia unei progresii aritmetice dacă
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