Разность арифметической прогрессии 6,5; 7,3; 8,1;... равна

Формула суммы n первых членов арифметической прогрессии

Quiz
•
Mathematics
•
9th Grade
•
Medium

Jamilia Irgaliyeva
Used 2+ times
FREE Resource
9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
8,1
0,8
6,5
-0,8
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Найдите пятый член арифметической прогрессии: 3; 7; 11; …
19
15
23
-15
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Арифметическая прогрессия задана формулой
аn = 2n + 1. Найдите S10.
24
240
120
12
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Найти сумму 12 первых членов прогрессии (аn), если
а5 = 12; а1 = 4.
180
30
360
152
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Найдите сумму 8 первых членов арифметической прогрессии:
- 23;- 20; …
45
100
-45
-100
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
a1=3. d=4. Найти S4-?
19
36
-36
54
8.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
a1=-3, a6=21 S6 - ?
53
46
54
-36
9.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
a1=-7. d=4 S5-?
4
5
6
-5
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