\"\"

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The sum of a geometric series is \"\".

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Where \"\" is first term and r is common ratio.

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The given values \"\".

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\"\"             (Substitute \"\")

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\"\"             (Subtract denominator: \"\")\"\"

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\"\"  (Evaluate power: \"\")

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\"\"        (Subtract numerator: \"\")

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\"\"                       (Multiply: \"\")

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\"\"                         (Divide: \"\")\"\"

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The value of \"\".