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I have a question about how to express sign changes in sigma-(Answered)


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I have a question about how to?express sign changes in sigma notation (Taylor series). I looked at Wolfram alpha, however, I am not sure whether I can see correctly how the sign change is expressed .

Thank you.

Ue B 25.5 (c)



How do I create a sigma notation for this series?


My suggestion: 1 + Sigma (from infinity to n=0) theta^n/ ((2^n) * n!)


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#9210456 | Written in 27-Jul-2016

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