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  1. #1
    Junior Member user4e3's Avatar
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    how to derive future value of annuity formula?

    how do you rearrange a geometric progression formula step by step into a future value of annuity ?

    From
    S = a( 1-r^k ) / (1- r)

    to

    S = R ((1+i)^n-1 / i)

    I do not understand how is it possible to isolate the denominator to "i"

    thanks!

  2. #2
    Junior Member ElinorE's Avatar
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    http://getininfo.zzzo.one.pl
    you can get much information in this website,kindly stay a minute in website and check anyone link at a time,and you can aslo get your question answer in Google Search in this website, which has helped me very much.

  3. #3
    Junior Member ElinorE's Avatar
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    http://getininfo.zzzo.one.pl
    you can get much information in this website,kindly stay a minute in website and check anyone link at a time,and you can aslo get your question answer in Google Search in this website, which has helped me very much.

  4. #4
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    One way of solving this is putting the equation into a grapher as y1 and then put the desired output as y2, then find the point of intersection. This is the value of i at the current point.

    Note, make sure I is put as "X" in the grapher


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