第四冊1-1 等差數列-4

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

第四冊1-1 等差數列-4

等差中項

班級 *

座號 *

1. 有一等差數列a1 , a2 , a3 , a4 , a5 , a6 , a7，則下列選項何者錯誤？

20 points

a2－a1＝a3－a2

a3－a1＝a4－a2

a1與a7的等差中項為a5

a1 , a3 , a5 , a7也是等差數列

Clear selection

2. 若2 , a , b , c , 7為等差數列，則下列選項何者正確？

20 points

b＝a＋2

b＝7－c

b＝a＋c

選項 4

Clear selection

20 points

Clear selection

4. 在－3與9之間加入三個數後成一等差數列，則下列敘述何者錯誤？

20 points

加入的第一個數為0

加入的第二個數為3

加入的第三個數為6

公差為－3

Clear selection

5. 有一等差數列a1 , a2 , a3 , a4 , 6 , a6 , a7 , a8 , a9，公差為d，且d＞0，則下列選項何者錯誤？

20 points

a1＋a9＝12

a2＋a8＝12

a2－a1＝a3－a1

a2－a1＜a3－a1

Clear selection

Submit

Clear form

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy