Use the partial fraction command on your CAS to find a convenient expression for the partial sum,

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Use the partial fraction command on your CAS to find a convenient expression for the partial sum, and then use this expression to find the sum of the series. Check your answer by using the CAS to sum the series directly.


n? + 3n + 1 E (n2 + n) 48. 47. E (4n + 1)(4n 3) -1
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