
BT Quizz - Cấp số cộng
Authored by Trương Nhung
Mathematics
11th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho cấp số cộng có u₁ = -3, d = 4. Chọn khẳng định đúng:
u₅ = 15
u₄ = 8
u₃ = 5
u₂ = 2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các dãy số sau, dãy nào là cấp số cộng?
-1; -3; -7; -11; -15
-1; -3; -6; -9; -12
-1; -2; -4; -6; -8
-1; -3; -5; -7; -9
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho cấp số cộng (uₙ) với u₁ = 3, u₂ = 7. Công sai của cấp số cộng đã cho bằng:
4
7/3
1
3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho cấp số cộng (uₙ) có u₁ = 2, d = 3. Số hạng thứ 7 là:
20
21
19
23
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho cấp số cộng (uₙ) thỏa mãn u₁ = 34, u₁₀ = 10. Công sai bằng:
6
-6
3
-3
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