2下 1-1 等差數列
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
康軒數位 康軒數位
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列何者不是等差數列?
0 , 0 , 0 , 0
1 , 1 , 1 , 1
-10到10之間所有整數的數列
1到20之間所有質數的數字
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知有兩等差數列,其中一數列首項為2,公差為2,另一數列首項為3,公差為3,則此兩數列的共同項所形成的數列中,其第4項為何?
8
12
18
24
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若一等差數列的公差為4,第5項為13,則首項是多少?
-3
1
5
9
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在1~300且個位數字為3的正整數,自小到大排列的數列中,請問下列敘述何者不正確?
此數列為等差數列
此數列公差為10
此數列末項為293
此數列共有29項
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a , b , c , d , e五點依序在數線上,且b , c , d分別為a與e之間的等分點,則下列敘述何者不正確?
b是a與c的等差中項
c是b與d的等差中項
c是a與e的等差中項
a+b+c+d+e=3c
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若甲、乙兩數的乘積為-35,其等差中項為1,則|甲-乙|=?
-12
2
6
12
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
等差數列a1,a2,a3,……,an,其公差為d (其中d ≠ 0且a1 ≠ d),則下列何者錯誤?
a1+a3+a8=2a6
a7-a2=5d
a2+a10=a4+a8
a7-a4=a10-a7
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