某型號手提電話的原價是$3000元. 推出后三個月跌價5%, 然後每月折舊10%
求手提電話推出2年后的價值!!!
maths強的in!!!
2006-10-20 2:18 am
回答 (4)
2006-10-20 2:22 am
✔ 最佳答案
三個月後的價錢︰3000*0.95再過了一年零九個月後的價錢︰
3000*0.95*(0.9)^(9+12)
=311.8元
2006-10-29 11:33 pm
3000*(1-5%)
=2850
2850*(1-10%)^21
=311.844119
=2850
2850*(1-10%)^21
=311.844119
2006-10-20 2:28 am
3000x(1-5%)x(1-10%)^21
(because there are 21 months between 4th month to 24th month)
= 311.844
=$312 (corr. to nearest dollar)
(because there are 21 months between 4th month to 24th month)
= 311.844
=$312 (corr. to nearest dollar)
參考: me
2006-10-20 2:27 am
第三月:$3000x95%
第四月:$3000x95%x90%
第五月:$3000x95%x(90%)^2
第六月:$3000x95%x(90%)^3
.
.
.
第n月:$3000x95%x(90%)^(n-3)
第以第2年
=第24月
=$3000x95%x(90%)^(24-3)
=$312
2006-10-19 18:28:20 補充：
The answer is cor. to 3 sig. fig.(準確至3位有效數字)
第四月:$3000x95%x90%
第五月:$3000x95%x(90%)^2
第六月:$3000x95%x(90%)^3
.
.
.
第n月:$3000x95%x(90%)^(n-3)
第以第2年
=第24月
=$3000x95%x(90%)^(24-3)
=$312
2006-10-19 18:28:20 補充：
The answer is cor. to 3 sig. fig.(準確至3位有效數字)
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https://hk.answers.yahoo.com/question/index?qid=20061019000051KK02774