崩潰,一題econ計算題求助!! 

[backcolor=#ff99cc][size=3][/size][/backcolor] [backcolor=#ff99cc][size=3]Q2:[/size][/backcolor] [backcolor=#ff99cc][size=3][/size][/backcolor] [backcolor=#ff99cc][size=3]you deposit $20 at the end of each 3months into your bank A account for 2years earning 4% interest per year compounded every 3monthes.[/size][/backcolor] [backcolor=#ff99cc][size=3][/size][/backcolor] [backcolor=#ff99cc][size=3]Whould you rather stay with bank A, or switch to bank B that pays 3.997% interest per year compounded weekly.[/size][/backcolor] [backcolor=#ff99cc][size=3][/size][/backcolor] [backcolor=#ff99cc][size=3]Cauculate the effective rate for each bank to 5 decimal places. [/size][/backcolor] [backcolor=#ff99cc][size=3][/size][/backcolor] [backcolor=#ff99cc][size=3]Bank A Re:__[/size][/backcolor] [backcolor=#ff99cc][size=3]Bank B Re:__[/size][/backcolor]

求助高人...

我肯定是計算出問題了...有人會做這個嗎?

答案是什么? 先确定一下  咱们在finance 混的 这种题万一说错了太没面子 .. :)

豁出去面子了 .. 错了不管.. rB=(1+0.03997/52)^52 rA=(1+0.04/4)^4

Question is ambiguous, do you deposit $20 every 3 months into Bank B as well? Bank A effective rate: 4.060401 % Bank B effective rate: 4.076357 %

這就沒有答案啊,我算出來的太離譜了,所以我知道錯了 可是方法是怎麼樣也不懂 這種題書上找不到 話說那個定義題做出來了,但我還是不明白, 一樣也是書上沒有的 鬱悶

[quote]引用第4楼nonebo于2010-08-03 09:47发表的 : 豁出去面子了 .. 错了不管.. rB=(1+0.03997/52)^52 rA=(1+0.04/4)^4 ....... [url=/club/job.php?action=topost&tid=255475&pid=5912592][img]/club/p_w_picpath/back.gif[/img][/url] [/quote] 這樣算出來 rA是 1.04060401 rB是 1.040763571 我剛才試了樓上的答案是對的 rA是 0.04060401 rB是 0.040763571 所以bankB比較好 終於做對了...求方法+解釋......

[quote]引用第7楼kirayamato于2010-08-03 11:53发表的  : 這樣算出來 rA是 1.04060401 rB是 1.040763571 ....... [url=/club/job.php?action=topost&tid=255475&pid=5912753][img]p_w_picpath/back.gif[/img][/url] [/quote] 1+ i (eff) = (1 + i (m) / m ) ^ m m = annual compounding rate  ie compounded semi-annual  m = 2  quarterly m = 4  ect ect

Effective Rate = ( 1 + i / n)^n - 1 where i = simple annual interest, n = compounding terms per year 每三個月丢$20進去是個 trap, the fact that 妳放兩年也是個 trap 對選擇沒影響

yeah. that's part of business mathematics. which I am taking right now[s:201]

just find the formula for effective rate.

LS 的.....[s:201] are you from 抚顺 too?

[s:210]ANSHAN

SAME PROVINCIAL .CLOSE ENOUGH[s:204]

ANSHAN........辽C~?

恩 忘写要 减 1了..  太懒了..

有效利息就是把利息的還款週期換算成一年 如果是存錢或者借款，利息越高約好，貸款越低越好