(an) - арифметична прогресія. а4 =12, а5 =18. Знайти різницю d.
Прогресії 9клас.

Quiz
•
Mathematics
•
1st - 12th Grade
•
Hard
Інна Антипченко
Used 25+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
d = а5 - а4
d = 6
d = а4 - а5
d = -6
2.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
(an) - арифметична прогресія. а1 = -3, d = 2. Знайти a6.
a6 = -3 + 2 *(6 - 1)
a6 = -3 * 25
a6 = 7
a6 = 2 * (-3)5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(bn) - геометрична прогресія. b15 = 8, b16 = 32. Знайти q.
q = 32 /8 = 4
q = 8/32= 1/4
q = 32 - 8 = 24
q = -4
4.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
(bn) - геометрична прогресія.
2; b16 ; 18. Знайти b16.
√2*√18
2+18
(2+18) /2
6
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
(an) - арифметична прогресія. 16; a9; 24. Знайти a9.
20
24-16
(16+24)/2
√16*√24
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
(an) - арифметична прогресія. а1 = 3, a5 = 13. Знайти S5.
(3 + 13) * 5 /2
(13 - 3) * 5 /2
(2 * 3 + 13) * 5 /2
(3 + 2 * 13) * 5 /2
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
(bn) - геометрична прогресія.
b1 = 2, q = 3. Знайти b3.
2 * 32
2 + 3 * 2
2 * 33
3+22
8.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
(bn) - геометрична прогресія.
b1 = 2, q = 3. Знайти S3.
2 * (1 - 33) / 1-3
2 * (1 - 32) / 1-3
3 * (1 - 23) / 1-2
3 * (1 - 22) / 1-2
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