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    Geometric Series and Sums

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    Part A Find a specific geometric that sums up to 30.
    Part B Can you find a specific geometric series that sums to -30 ?
    Part C Can you find a specific geometric series summing up to - ?
    Part D Determine precisely which real numbers can be sums of a geometric series.

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    https://brainmass.com/math/algebraic-geometry/geometric-series-sums-252145

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    Part A Find a specific geometric that sums up to 30.
    Solution
    There are two possibilities to determine sum of two geometric series.
    Suppose, if we take first term a=2, number of terms 4 and r = 2 then sum

    In case of infinite series then
    ...

    Solution Summary

    This provides examples of working with geometric series and sums.

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