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Last answer first: Since

**k**does not depend on n, then 1/(2k)! can be factored out of the series...1 Answers · Science & Mathematics · 25/11/2019

Hint: Let u =

**k**-9. Then write all as an expression as u. Then let u=**k**. Show ur steps if need be and we can take it from there.3 Answers · Science & Mathematics · 13/11/2019

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