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数学题,请英文好的进来解答一下,多谢1.)$10000isinvestedat5.6%p.ainterestcompoundedmonthly.(1)Howmuchisintheaccountafter(a)6months(b)3years(2)Howlongwouldittakefortheinvestmenttodouble?(3)Skeththemod
 更新时间:2024-04-20 02:22:21
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问题描述:

数学题,请英文好的进来解答一下,多谢

1.)$10000isinvestedat5.6%p.ainterestcompoundedmonthly.

(1)Howmuchisintheaccountafter

(a)6months

(b)3years

(2)Howlongwouldittakefortheinvestmenttodouble?

(3)Skeththemodelshowingallinformationaboveonyourgraph.

2).Asingerwasgivena15yearcontractin1980.Shewouldreceive$1000000eachyearfor15yearsbeginningtoday1January1981andsoforth.Thecaaountwasearning6%P.a.compoundingannually.

(1)Ifnowithdrawalsweremadeonthisaccounthowmuchwouldbeintheaccouton

(a)31December1980

(b)31December1981

(2)Usetheorygiveninlecturetoderiveaformulafortheamountofmoneyintheaccounton31December1994(Youmustusethesumofgeometricseriestoderiveaformulafortheamountinaccountinthwaccountafternyearsandhencefindtheammountintheaccounton31December1994)

李兴国回答:
  不好意思,用中文来回答.   第一题   1各义年利5.6%,月计息,实际利率=(1+5.6%/12)^12-1=5.746%   6个月本利=10000*(1+5.746%)^6=13982.5$   三年本利=10000*(1+5.746%)^36=74731.2$   2(1+5.746%)^12=1.9551   (1+5.746%)^13=2.0674   12+(2-1.9551)/(2.0674-1.9551)=12.4个月可翻倍.   3图略   第二题:
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