Aritmetinė progresija
Quiz
•
Mathematics
•
11th - 12th Grade
•
Practice Problem
•
Hard
Silvija Sėrikovienė
Used 9+ times
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Duota, kad aritmetinės progresijos a10=8. Apskaičiuokite
a8+a9+a10+a11+a12.
80
50
40
8
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Apskaičiuokite
45+51+57+...+153
1800
1881
1880
1882
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Raskite skaičių x, tenkinantį lygybę: 1 + 3 + 5 +...+ (2x-1) = 81
9
8
1
5
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Apskaičiuokite d , jei a3=2 , а7= 14.
4
-7
3
7
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Raskite aritmetinės progresijos pirmąjį narį, kai a3=2, a7=14.
-4
-7
3
0
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jonas nusprendė taupyti pinigus ir dėti juos į taupyklę: pirmą dieną – 1 ct, antrą dieną – 2 ct, trečią dieną – 3 ct ir t. t. Kiek iš viso Jonas sutaupys pinigų, jei taip taupys 100 dienų?
5050 ct
2020 ct
3030 ct
4040 ct
7.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Bendrovė „Kėdė“ gavo užsakymą gaminti mokyklinius suolus. Pirmą mėnesį ji pagamino 1250 suolų, o kiekvieną kitą pagamindavo po 16 suolų daugiau nei prieš tai buvusį mėnesį. Kiek mokyklinių suolų bendrovė „Kėdė“ pagamino 12-tą mėnesį?
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