
Șiruri clasa 9
Authored by Larisa Niculicioiu
Mathematics
3rd Grade
Used 2+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Care sunt primii 3 termeni ai șirului ce au formula: an= 3n+1
4, 7, 10
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Care este al 4 lea termen al șirului ce are formula: an=n2-2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Gasiți formula termenului general pentru șirul: 2, 4, 8, 16, 32,...
an = 2n
an = 3n
an = n2
an = 2n
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fie progresia aritmeticǎ, avem a1=5 și r=3. Care este al 3-lea termen?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Se dǎ progresia geometricǎ cu primul termen b1=2 și rația q=2. Care este al 4-lea termen?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Care din următoarele șiruri este o progresie aritmeticǎ?
1, 3, 6, 10, 15....
2, 4, 8, 16, 32...
5, 10, 15, 20, 25....
1, 2, 4, 7, 11....
7.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Suma primilor 4 termeni ai progresiei aritmetice cu a1=1 și rația=2 este 16.
Adevărat
Fals
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