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Mathematics 14 Online
OpenStudy (anonymous):

My question is: How do I turn an expression of partial sums back to an expression of a sequence?

OpenStudy (anonymous):

a_n = s_n - s_n-1

OpenStudy (anonymous):

where s_n is partial sum of n terms

OpenStudy (anonymous):

Hmm... So... here's the example:

OpenStudy (anonymous):

|dw:1363563097878:dw|

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