Chapter9: Sequences, Probability And Counting Theory
Section9.4: Series And Their Notations
Problem 1SE: What is an nth partial sum?
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If the $n$ th partial sum of a series $\sum_{n=1}^{\infty} a_{n}$ is $s_{n}=3-n 2^{-n}$ find $a_{n}$ and $\sum_{n=1}^{\infty} a_{n}$
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