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Progresii

Quiz
•
Mathematics
•
9th Grade
•
Hard
Laura Rotaru
Used 85+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
DA
NU
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un sir de numere reale in care fiecare termen, incepand cu al doilea, se obtine prin adunarea precedentului cu acelasi numar este...
progresie geometrica;
sir monoton crescator;
progresie aritmetica;
sir nemarginit;
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Fie progresia aritmetica (an) cu a1=2 si r=3. Suma primilor 100 de termeni este:
1505
15150
15050
150500
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Fie progresia aritmetica pentru care a7=17 si a2=2. Suma primilor 50 de termeni este:
3265
3625
6325
1275
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Numerele 3x-1; x+3; 9-x sunt in progresie geometrica. Valoarea naturala a lui x este:
-1
1
3
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Solutia ecuatiei 1+4+7+...+x=117 este:
9
28
25
24
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
O tribuna a unui stadion se compune din 20 de randuri si fiecare rand urmator are cu 16 locuri mai mult decat cel precedent. in ultimul rand sunt 404 locuri. cati spectatori incap in tribuna (nu in vreme de pandemie... :) )?
4050
4040
5050
5040
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