
Progresii geometrice 2 - științe sociale
Authored by Monica Petre
Mathematics
9th Grade - University
Used 4+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Scrieți primii 4 termeni ai progresiei geometrice dacă b1=
și q= -
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Scrieți b3 și b8 ai unei progresii geometrice daca b5=-1, q=-0,5
b3= 4, b8= 0,125
b3= - 4, b8= 0,125
b3= 8, b8= 0,5
b3= 4, b8= - 0,125
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aflați termenii b1, b2, b3 ai următoarei progresii geometrice: b1, b2, b3, -9, -27, -81, ...
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Fie (bn) o progresie geometrică în care b1=-5 și
. Studiați dacă 10 este un termen al progresiei și precizați rangul acestuia.da, rang 2
da, rang, 3
nu
da, rang 4
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Într-o progresie geometrică cu rația negativă avem a2=3 și a4=147. determinați a3.
-21
21
-10
-7
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Determinați numărul real pozitiv x, știind că x, 6 și x-5 sunt în progresie geometrică.
9
4
3,5
5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculați 2+22+23+...+29
1022
1021
1122
1024
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