Progresii geometrice

Progresii geometrice

9th Grade

10 Qs

quiz-placeholder

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Progresii geometrice

Progresii geometrice

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Monica Dumitrache

Used 545+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Al treilea termen al unei progresii geometrice cu primul termen 0,5 și rația 2, este:

1

1,5

2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Care dintre șirurile de mai jos sunt progresii geometrice?

3, -3, 3, -3, 3, -3, ...

2, 4, 6, 8, 10, ...

1, 3, 5, 7, ...

-8, -5, -3, -1, 0, 3, ...

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Primul termen al progresiei geometrice este 4, iar rația 2. Determinați al cincilea termen.

64

128

16

4.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Găsiți suma primilor șapte termeni ai progresiei geometrice dacă

b1 = 0,15, q = 2.

5.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

 În progresie geometrică  b7b15=25.b_7\cdot b_{15}=25. Calculați  b4b18b_4\cdot b_{18} .  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Ratia progresiei geometrice in care suma primilor trei termeni este 21 iar suma urmatorilor trei termeni este 168 este:

-4

-2

2

4

7.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Într-o progresie geometrică termenul al 4-lea este 9 iar al șaselea termen este 16. Al cincelea termen din această progresie este:

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