2下 1-1 等差數列

2下 1-1 等差數列

8th Grade

10 Qs

quiz-placeholder

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2下 1-1 等差數列

2下 1-1 等差數列

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Medium

Created by

康軒數位 康軒數位

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10 questions

Show all answers

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ae之間的等分點,則下列敘述何者不正確

bac的等差中項

cbd的等差中項

cae的等差中項

abcde=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a1a2a3,……,an,其公差為d (其中d ≠ 0且a1 d),則下列何者錯誤

a1a3a8=2a6

a7a2=5d

a2a10a4a8

a7a4a10a7

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