若是等差數列,求它的公差;若是等比數列,則求它的公比//唔該每條都條式我

2006-12-04 3:49 am
a) 6,30,150,750,3750 b) -2,-5,-8,-11,-14 C) 20,-40,80,-160,320 d) 180,164,148,132,116
更新1:

唔該每條都(((比條式我)))

更新2:

唔逐 清楚列明成條式

更新3:

唔該 清楚列明成條式

回答 (1)

2006-12-04 4:06 am
✔ 最佳答案
a) 6,30,150,750,3750
公比 = 30/6 = 5

b) -2,-5,-8,-11,-14
公差 = (-5)-(-2) = -3

c) 20,-40,80,-160,320
公比 = (-40)/20 = -2

d) 180,164,148,132,116
公差 = 164-180 = -16


收錄日期: 2021-04-23 16:25:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061203000051KK04646

檢視 Wayback Machine 備份