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Ue B 25.5 (c) How do I create a sigma notation for this-(Answered)

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Please answer my question attached giving as much information as possible.

Thank you.



Ue B 25.5 (c)

 


 

How do I create a sigma notation for this series?

 

My suggestion:

 


 

Sigma (from n=0 to infinity) theta^n / (n+1)!!

 


 

I have not included the changes of the signs, i.e. + + - - + ?

 

I know that I can show alternative changes with (-1)^n but here I do not know how to handle the

 

sign changes.

 

Is my double factorial correct?

 

How (when) can I express a double factorial in a single factorial?

 


 

 

Paper#9209048 | Written in 27-Jul-2016

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