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Math Help - Present value of $1 per week

  1. #1
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    Present value of $1 per week

    Hi folks,

    I've been desparately trying to work out the underlying formula for the attached table. If someone could assist me in this, I would be grateful.

    Thanks
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Scuzzie View Post
    Hi folks,

    I've been desparately trying to work out the underlying formula for the attached table. If someone could assist me in this, I would be grateful.

    Thanks
    My first thought would be to graph it and see what it looks like. Have you done this yet?

    -Dan
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  3. #3
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    Hi Dan, no I haven't graphed it because what I need is the underlying equasion for the attached table and then I can adapt it to calc different multiples of weeks and parts thereof.

    thanks for your reply
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  4. #4
    GAMMA Mathematics
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    Present value of $1 a week from now is .9989 which means there is an interest rate of .11% per week. An annuity is the present value of a series of payments.

    The resulting equation is a series depending on how many weeks you want to sum:

    \sum_{k=1}^{n+1} \frac{1}{1.0011^k}
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