
quizz grigorescu maria
Authored by Maria Grigorescu
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un sir de numere real cu primul termen nenul, in care orice termen incepand cu al doilea se obtine din termenul precedent inmultit cu acealsi nr fixat nenul se numeste ..... .
progresie aritmetica
progresie geometrica
ecuatie
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se considera o progresie aritmetica cu ratia 4 si a6 = -10. Calculati a8
-2
2
-30
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se considera o progresie aritmetica cu a1 = 2 si a20 = 98
Calculati a1 + a2 + ... + a20
20
500
1000
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se considera o progresie aritmetica cu ratia 3 si a1 = 2. Calculati a6
17
-17
7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se considera o progresie aritmetica cu a2=7 si a3= 1
Determinati ratia acestei progresii
-6
8
6
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sa se determine primul termen al progresiei geometrice (bn) stiind ca b7 = 16 si q = 2 .
2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Progresia geometrica este un sir de
numere
litere
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