
K11.B7. Cấp số nhân

Quiz
•
Mathematics
•
11th Grade
•
Medium
Đỗ Hằng
Used 1+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các dãy số sau, dãy số nào là cấp số nhân?
2; -4; 8; -16; 32.
2; 4; 6; 8; 9.
3; -9; 27; 81; 243.
1; 3; 5; 7; 9.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho CSN (Un) có U1 = 1; q = 5. Số hạng U4 là:
16
625
125
21
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho CSN (Un) có U1 = 6; U2 = -3. Công bội q của cấp số nhân là:
0,5
-2
2
-0,5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho CSN (Un) có công bội q. Mệnh đề nào sau đây đúng?
un-1 = un.q (n≥1)
un = un-1.q (n≥2)
un+1 = un-1.q (n≥1)
un+1 = un + q (n≥1)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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