上海市現現有人口11,767,000人。於過去20年,每二年人口增加8%,求該市20年前的人口。
(準確至個位)請詳細列明計算步驟。
數學通縮和通脹的問題
2006-10-28 7:06 pm
回答 (2)
2006-10-28 7:54 pm
✔ 最佳答案
每兩年增加8%,咁即係人口喺20年會番10次設上海20年前人口為x
X (1+8%)^10 = 11,767,000
X = 11,767,000 ／(1+8%)^10
X = 5,450,397.774
20年前人口為5,450,397人
2006-10-28 8:51 pm
The solution provided by "New Comer" (previous one who answer the question) has one error:-
"X = 5,450,397.774" should be round up! Therefore, the population should be 5,540,398(!)
"X = 5,450,397.774" should be round up! Therefore, the population should be 5,540,398(!)
收錄日期: 2021-04-29 22:05:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061028000051KK01202