Progresii

Progresii

9th Grade

10 Qs

quiz-placeholder

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Progresii

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Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Laura Rotaru

Used 85+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Vrei un punct din oficiu?

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:

 92\frac{9}{2}  

-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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