TEST DE EVALUARE PROGRESII ARITMETICE SI GEOMETRICE

TEST DE EVALUARE PROGRESII ARITMETICE SI GEOMETRICE

9th Grade

13 Qs

quiz-placeholder

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TEST DE EVALUARE PROGRESII ARITMETICE SI GEOMETRICE

TEST DE EVALUARE PROGRESII ARITMETICE SI GEOMETRICE

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Nicoleta Dinca

Used 90+ times

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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Determinați al patrulea termen al unei progresii aritmetice dacă primul termen este 2 și rația este 3.

10

-10

12

11

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Dacă numerele (x-1), (x+5) ,(2x+8) sunt în progresie aritmetică, atunci valoarea numărului real x este:

2

3

5

-2

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Calculați suma S=1+5+9+...+25.

91

94

100

40

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 Determinați  a1  a_{1\ \ } și r  dacă  ÷ a5=12        \div\ a_5=12\ \ \ \ \ \ \ \  și  a19=19a_{19}=19   (progresie aritmetica)


 a1=10      a_1=10\ \ \ \ \ \   și r=0,5r=0,5  

 a1=12      a_1=12\ \ \ \ \ \   și  r=3r=3  

 a1=7   a_1=7\ \ \   și r=3r=-3  

 a1=10  a_1=-10\ \  și r=7r=7   

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Se consideră progresia aritmetică  (an)n1\left(a_n\right)_{n\ge1}  în care  a3=11a_3=11  și  a7=3a_7=3  . Valoarea termenului  a11a_{11}  este:

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Fie progresia aritmetică  (an)n1\left(a_n\right)_{n\ge1} în care  a3+a19=10a_3+a_{19}=10  . Valoarea sumei  a6+a16a_6+a_{16}   este:

20

10

5

25

7.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Fie progresia geometrică

  (bn)n1\ \left(b_n\right)_{n\ge1}  dacă  b1=12b_1=12  și  q=0,5q=0,5  atunci  b4este:b_4este:  

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