math

To what value does the sum 20+12+36/5---tend as n.

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  1. Even though with only 3 terms,
    20 + 12 + 36/5 + ....

    seems to be the sum of an infinite series with
    a = 20 and r = .6
    Sum(all terms) = a/(1-r)
    = 20/(1-.6)
    = 20/.4
    = 50

    btw, " ---tend as n"
    makes no sense.

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    posted by Reiny

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