$2000 x (1-r %)^2 = 1805
r點計出黎...
我要step..thx
更新1:
samuel19871 所答的答案錯誤................................!!
更新2:
p3b11 其實個ans is 5...... 但,我唔係好明你計咩...><" 我中三的... 好似有d野我未睇過....so...唔明
maths一條-----"折舊率"
回答 (3)
2007-09-15 6:54 am
(1-r %)^2 = 0.9025
1-r%=0.95
1-r% = 95%
r = 5
1-r%=0.95
1-r% = 95%
r = 5
2007-09-15 6:49 am
2000x(1-r)x(1-r)=1805
2000x(1-2r+r^2)=1805
r^2-2r+1=361/400
400r^2-800r+39=0
r=(800士√(-800)^2-4x400x39)/2x400
r=1.95(rejected) or 0.05
so r is 5%
2007-09-14 22:51:37 補充：
r=1.95 not 0.05so r=195%
2000x(1-2r+r^2)=1805
r^2-2r+1=361/400
400r^2-800r+39=0
r=(800士√(-800)^2-4x400x39)/2x400
r=1.95(rejected) or 0.05
so r is 5%
2007-09-14 22:51:37 補充：
r=1.95 not 0.05so r=195%
參考: me
2007-09-15 6:42 am
(1-r%)^2=1805/2000
1-r%=(1805/2000)^1/2
r%=1-(1805/2000)^1/2//
1-r%=(1805/2000)^1/2
r%=1-(1805/2000)^1/2//
收錄日期: 2021-04-20 13:31:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070914000051KK04143