
8D 2/21測驗
Quiz
•
Mathematics
•
8th Grade
•
Hard
蔡詠青 蔡詠青
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11 questions
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1.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
首項a1=5,公差d=5,則a9=?
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
有一等差數列 1, 4, 7,10,13,15 ,則公差d=?
1
15
3
6
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
若有一數列 6,6,6,6,6,是否為等比數列?是的話公比r=?
不是
是,公比r=0
是,公比r=6
是,公比r=1
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
請問數列1,2,4,6,8,是否為等比數列?
是
否
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
已知有一等差數列3,5,7,....,33,則此等差數列共有幾項?
14
33
15
16
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
首項a1=10,公差d= -3,則a7=?
-8
28
-11
21
7.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
若有一等比數列9,-9,9,-9,9,-9,則公比r=?
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