n +4 The nth partial sum of the series En=1 an is given by n n - 5. Select the correct rule for a,or the actual nth term. Hint: a, = Sn- Sn - 1 a an (п - 5) (п - 6) b -9 an = (n – 5)(n – 6) -5 an (п - 5)(п - 6) 2n2 -9 an (п - 5) (п - 6)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
n + 4
The nth partial sum of the series 2n=1 an is given by
n - 5.
Select the correct rule for a,or the actual nth term.
Hint: a, = Sn - Sn - 1
a
9
an
(п - 5) (п - 6)
-9
an
(п - 5) (n - 6)
-5
an
(п - 5) (п - 6)
d.
2n? -9
an
(п - 5)(п - 6)
Transcribed Image Text:n + 4 The nth partial sum of the series 2n=1 an is given by n - 5. Select the correct rule for a,or the actual nth term. Hint: a, = Sn - Sn - 1 a 9 an (п - 5) (п - 6) -9 an (п - 5) (n - 6) -5 an (п - 5) (п - 6) d. 2n? -9 an (п - 5)(п - 6)
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