IX, FISA 2

Quiz
•
Mathematics
•
9th Grade
•
Hard

SANDA BARBU
FREE Resource
77 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Să se determine al optulea termen al șirului 1, 5, 9, 13, ... .
a8 = 29
a8 = 25
a8 = 33
a8 = 21
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Să se calculeze suma primilor 7 termeni ai progresiei aritmetice (an)n≥1 în care a1 = 3 și r = -2.
-21
7
0
-7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Adevărat
Fals
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Să se determine al zecelea termen al unei progresii geometrice în care rația este 1/5 și primul termen este 3125.
1/625
5
625
1/3125
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Să se calculeze suma: 2 + 5 + 8 + ... + 44.
345
330
360
315
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În progresia aritmetică (an), se cunosc: a6 = 20, a26 = 120. Să se găsească a10.
40
60
80
100
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