Re: [計量] 一題Q 四月JJ答案貌似有錯?
※ 引述《uo2029 (uo2029)》之銘言：
: 6) A certain amount P after 7 1/4 yrs is doubled .If the entire investment is
: reinvested how much will be the return after 29 yrs.
: starting =p
: after 7 1/4 years =2p
: after 14 1/2 years=4p
: after 29 years=8p
: answer is 8p
: 怎麼看都是p*(2^4) = 16p 阿...?
我認為關鍵句子在"the entire investment is reinvested"
我解讀的意思第一個周期87 months p is doubled to 2p
但是每個周期結束,"the entire investment is reinvested",
意思是說第二個周期丟進去的錢是p不是接續著丟2p進去
所以四個周期 4x2p=8p
看答案找解答,不知是對是錯 >_<
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